The duration of your stay in Australia varies from 12 months to 4 years, depending on the type of Work Visa you hold. If you are under the RSMS or ENS categories, you can stay indefinitely as long as you maintain sponsorship under these schemes.

To work in Australia through the Skilled Visa, you need to meet the following requirements:

1. Age: You must be under 45 years old at the time of application.
2. English Language Proficiency: Demonstrate competent English language skills suitable for working in Australia.
3. Occupation: Your nominated skilled occupation must be listed on the Skilled Occupation List (SOL) and be relevant to your qualifications and skills.
4. Skills Assessment: Your skills must be assessed by the designated Australian assessing authority for your nominated occupation before applying.
5. Health: Undergo a medical examination conducted by a panel doctor to demonstrate good health.
6. Character: Provide evidence of good character, which will be assessed as part of the application process.
7. Points Test: Score at least 65 points on the Points Test, based on factors such as age, English proficiency, skilled employment experience, and education qualifications.

For nurses applying for registration as an enrolled nurse in Australia, the language proficiency requirements include achieving a minimum overall score of 7 in each of the four components (listening, reading, writing, and speaking) on the IELTS (academic module). Alternatively, applicants can also undergo the OET or PTE (Academic) English tests.

Here is the process for applying for an Australia Work Visa from India:

1. Achieve the required band score in IELTS.
2. Obtain skills assessment results from the relevant Australian assessing authority.
3. Choose a suitable occupation from the Skilled Occupation List (SOL) of Australia.
4. Secure sponsorship or nomination if applying for a Sponsored Visa.
5. Apply for an appropriate skilled visa, such as Subclass 190, 189, or consider the 491 subclass Regional Provisional Visa.
6. Score at least 65 points on the Australian points-based system; higher scores increase your chances of obtaining a PR Visa.
7. Upon receiving an invitation to apply for a visa, submit your application within 60 days.
8. Obtain necessary character and health certifications as required.

IELTS is the primary language test used to demonstrate English proficiency when immigrating to Australia from India or other countries. A good IELTS score is essential because English is Australia’s primary language.

Alternatively, applicants can also opt to take the PTE (Academic), OET, or CAE English tests based on the specific requirements of skilled migration authorities.