People Should be able to make you do something if they think it is for your own good.

What do you think?
As a school leaver you've just stepped into a new world, where there are no rules, and choices are made by yourself and they are easy ones.
In this case having no older family that are well aware of uni and tafe, You need a mentor.
A mentor is someone you can talk to that will give you advice and lead you in the way you want to go. e.g If you want to be a teacher, you talk to a teacher not a carpenter. There is a difference. It's not the same courses and choices. Similar to a councelor except in more detail.
e.g. A teacher course would be for you to become a teacher and then you can study carpentry indepth so that you can teach woodwork, or carpentry or go into the carpentry industry. To broader your options.
THe more you study the more options you'll have, Or if you just love both, do both although they are completely different.