MESO
Investigate mature age entry. Email them , go and see them apply. Get advice from them.
Your studies will help as too will the time and your membership here.. shows your interest.
Universities often have bridging courses where they will build your basics. This is your first port of call at any university. Ask about bridging to get you into science at latrobe uni if you are in bendigo.
There is also some TAFE transition courses but not sure about the science ones. Go to the TAFE and ask.
Uni's also accept bridging via TAFE
There are also on-line uni courses . You can do degrees at home on your computer these days.
Yes. You can do it . and why not.
You sound keen so go for it