Jake65 I'm doing methods 1/2 in year 10 this year, and some of my friends are doing general 1/2 so I kind of have an idea what its like? for methods its basically just practice, do as many exercises as you can and ask your teacher the moment theres something you don't understand because unit 1 starts really easy and then they will start piling work on you. I'd say chapter 1, 2, and 3 are really easy but for things like transformations I had to actually try and memorise them. and I also think it gets a bit harder in unit 2 but then unit 3/4 they will definitely make it a lot harder so u need a strong foundation. For general my friends don't study icl but they said they were doing really simple stuff like percentages and rounding or smth for the first few topics but dont quote me on that.
In term of resources vce rocks has some, so you could check there. I just get them from my friends who do tuition so if you do tuition they might have some extra resources.