You can easily get qualified to immigrate to Australia if you meet the following requirements:

Points: A minimum score of 65 in the Points Grid.
Age: Below 45 years.
English proficiency: PTE Score or IELTS test results.
Skills Assessment: Skill assessment by certified authorities in Australia.
Occupation: Occupation should be listed in Australia’s Skilled Occupation List or Priority Migration Skilled Occupation List (PMSOL).

Immigration to Australia through PR Visa takes on an average of 5 months and can take 12 months as well. This is dependent on individual circumstances. It will take roughly 3 months if you have all the required skills and points score.

Below is the stepwise immigration process for Australia:

Obtain the IELTS certification with the required score
Obtain Skill Assessment from the appropriate authority for assessment
Select an occupation from the Skilled Occupation Lists
If applicable, obtain Nomination/Sponsorship from a Territory or State in Australia
Submit an Expression of Interest – EOI on Skill-Select
You will receive an Invitation to Apply for the Visa if your profile is selected
You will have sixty days for submitting the Australia Visa application

According to the Australian government, you should have an Australian visa to enter the country.
The different types of Visas offered by Australian government are given below.

Visitor Visa – If you are planning to visit Australia for a short period of time, you will require a Visitor Visa. This visa can be issued for a period ranging from a month to a maximum of 12 months.
Sub-class 771 Transit Visa – If you want to transit via Australia, this Visa is for you. This Visa is valid for 72 hours only.
Sub-Class 602 Medical Treatment Visa – If you want medical treatments, Consultations or donation of organs in Australia, this is for you. Surrogacy does not fall under this Visa.
Sub-Class 417 Working Holiday Visa – If you are aged between 18 to 30 years and interested in enjoying a holiday along with working for a maximum period of 12 months, this Visa is what you should go for. There are some countries to which this Visa is issued. They include The UK, Canada, France, Germany, Denmark, Belgium, South Korea, Taiwan, Japan, Norway, Sweden, Ireland, Malta, Hong Kong, Netherlands, Italy, Finland, Cyprus and Estonia.
Sub-Class 462 Work and Holiday Visa – Just like the Sub-Class 417 Work and Holiday Visa, this visa is offered to people travelling from The US, Brazil, China, Turkey, Poland, Portugal, Argentina, Chile, Malaysia, Bangladesh, Thailand, Slovakia, Slovenia and Uruguay. The maximum time this Visa is valid is 12 months.
Sub-Class 500 Student Visa – If you are looking to pursue a full time study in recognized Australian Educational Institutions, this Visa is what you should look for.
PR Visa – If you want to become a permanent resident of Australia, you should apply for this visa. You should understand certain policies and laws before applying to the PR Australian visa. If you become a PR of Australia, you will not only have complete rights to work and live there but also given all the benefits like medical coverage (Medicare) by the government of Australia.
Sub-class 155, 157 Resident Return Visa (RRV) – People holding this type of visa can return to Australia as a PR after travelling to other countries. You can re-enter Australia multiple times before the date of expiry of the visa. The validity of this visa ranges between 3 months to 5 years.
Sub-class 444 – Special Category Visa – This visa is exclusively issued to the citizens of New Zealand. It is issued to only those who hold a valid New Zealand Visa. This visa allows the holder to work, visit or reside in Australia. It is issued to people who have ‘No Untreated Tuberculosis (TB) and ‘No Criminal Background’. They should also not have been excluded, deported or removed from any country in the past. This Visa is issued after the person arrives at Australia.
Sub-class 808 Confirmatory Resident Visa – This Visa is issued to those people who have fulfilled all the desired requirements when holding a Norfolk Island Immigration Permit (Either GEP, TEP or (Unrestricted Entry Permit) UEP). People holding this Visa can work and live anywhere in Australia. They can enter and leave Australia whenever they want but within the expiry date of the Visa.

Eligibility criteria for PR visa:

Points required: Minimum 65 points in the Points Grid

Age: Below 45 years

English proficiency: A competent level of proficiency in English

Health and character: Good health and character

Skills: Skill assessment by certifying authorities in Australia

Occupation: Occupation must be nominated in Australia’s Skilled Occupation List

Australia offers different immigration pathways for highly educated and skilled individuals and can contribute well to the Australian economy. Australia has a huge requirement for skilled workers who can contribute to the country’s development. But without a job offer as a skilled worker also, you can migrate to Australia.

Skill Select Program: An individual can move to Australia without a job offer. You just need a few necessary skills and qualifications to work in Australia. The Australian government will make your profile available to employers so that they can nominate you.
Skilled Independent Visa (Subclass 189): Applicant must give an Express of Interest through skill selection before submitting the application.
Skilled Nomination Visa (Subclass 190): This has similar privileges as Subclass 189. The applicant must choose an occupation from Consolidated Sponsored Occupation List (CSOL) and submit their profiles.
Family Sponsorship: if you have a family member in Australia who has Permanent residence or citizenship in Australia. Under this sponsorship, the applicant need not have any job offer.
Business Innovation and investment program: Using this program, the applicant can own or manage a business in Australia or conduct a business or invest in any entrepreneurial activity in Australia.
Global Talent Scheme: This Scheme is to get highly skilled global talent to the country and encourage innovation. This Golden Talent scheme helps international talent invest in startups in Australia to give access to workers in Australia to provide advanced skills.