I think what you should do is really try to understand the
concepts behind trig.
You can do so by looking through your class notes, through any of the textbooks your school has provided (you can borrow or buy these too) as well as from any notes your tutoring place gives you (if you do go tutoring).
Once you have gone through essentially the "theory" behind trig, then keep trying your hand at trig questions. Do basic ones (to build your confidence) and slowly work your way up.
With identities, it really is about having a solid grounding of what they are - and then doing lots and lots of Qs on them (trust me, I used to hate identities but they eventually became my favourite part of math - because really, most of them are proof Qs where the answer is already given!)
With bearings, I would say you really have to understand what the question is asking (each Q will be a little different obviously). Diagrams will definitely help and once you understand how they work and practise, you will be fine
Hope this helps!
Also, don't panic or try to rush it now! It's okay if it takes you a little longer to understand and really get a grip on the concepts when you've just started year 12. You have the holidays ahead of you so you will be fine!