The first thing you need to think about is what kind of job or career you are aiming for. Then find out whether you need a particular type of qualification for that job. For example, if you want to be a teacher, you will need a Bachelor of Education degree or a teaching Diploma. Make the decision about whether you need a degree, a diploma, or a certificate. You also need to think about whether you will study full- or part-time, or whether distance learning might be better for you.
You can get help with planning your career and what type of studies you will need to do from the Central Applications Office website.
Then you need to think about the location - do you need to live with your parents while you are studying to save costs? Then you will need to find an institution close to home. Some courses are only available at particular institutions, so you may have to stay in a different place if you plan on doing that course.