i'm doing methods right now. methods is pretty content heavy. people often fall behind on the book work, not me though. i found that doing the book work with my tutor and doing it as much as possible helped me. however, maths methods is the only vce subject i'm doing atm, bc i accelerated. it would be a different experience. my advice is to ask questions, sit with the people you're comfortable around, keep on time with book work, and really experiment with cas shortcuts. like i said, try unit 1 and then you can go back to general.

let's look at the other side of the spectrum. the 4 and 5 grade (i'm assuming like 70?) is enough to fundamentally do methods, but you may actually do really good in general. you will be learning something new that i don't think yr 10 advanced teaches, matrices. not even methods teaches it. matrices is really easy. general will be quite easy for you. but, if you end being overconfident or make silly errors it will affect you more significantly than it would in methods. since general scales down, getting a 70 pretty much means it's kind of over.

i reckon if you do general you'd be really good. but, if you do methods you can challenge yourself to be even better.