You must be 18-30 to apply for a Work and Holiday visa. You can follow the steps given below to get a Work and Holiday visa in Australia:
Step 1: Check if you are eligible to apply for the Subclass 462 visa
Step 2: If yes, create an ImmiAccount on the official website
Step 3: Register for the ballot
Step 4: Fill out the online visa application form
Step 5: Arrange the required documents as per the checklist
Step 6: Complete the visa fee payment
Step 7: Submit your application online and await the status.