I'm in Melbourne, not that far away. I'm sure there's a few Sydney siders here.
Here are some
support groups listed on Diabetes NSW, a good place to get in touch with other T1s.
Of course it's worth doing your law degree, T1 shouldn't stop you doing anything, it just makes a few thing a bit more difficult. I've had T1 for 43 years, I've done scuba diving courses in the Maldives, travelled Australia for 12 months in a 4wd, trekked through Thailand, been married for 20 years, have 2 beautiful (non T1) teenage daughters and a successful career in IT.
Don't let it stop you!
My control has only been really tight for the last few years, so it never too late to get on top of it.
I'd suggest doing a DAFNE course, it is a great starter to learn all the mechanics, adjustment techniques and meet other T1s.
There is also heaps of help available on this forum, just ask. It's a lot more progressive and active than most Australian D forums.
Good Luck.