Personally, I found PHYS1121 quite hard, but that was probably because I was a bit shocked how there was so much more maths in University level physics than in HSC physics, however, a hard course can motivate you to study hard in it (from memory, I think I got 82 in it even though it was a subject that I thought I would fail-seriously). PSYC1001 would be a great chance to elevate your WAM, because you get bonus course credits through compulsory experiment participation and the final exam is all multiple-choice, if you are good at rote-learning content, you will be able to secure a substantial amount of marks for first year psychology courses, but obviously, if you find personal connection to the content, you will come to enjoy the courses even more. 75 WAM is achievable, but it really depends on how hard you work, I heard ENGG1000 is the kind of subject where your marks is to a certain extent dependent on the team you find yourself in-perhaps a more cooperative team leads to greater motivation to work towards the final goal. MATH1131 is a subject requiring consistent practice and revision-if you consistently finish your homework-or at the very least make a decent attempt, you should get fine marks for it
. Best wishes for first year uni-the most difficult thing will be to find study methods that will suit you. For psychology, I highly recommend you to familiarise yourself with the Harvard referencing system for when you write up your research report -it is so tedious and I personally found the referencing much more difficult than the AGLC referencing we use in law. Best wishes