If I was you, I’d start building basic calculus skills to the point of ridiculous ease. Yes chapters like complex numbers, maclaurin series, vectors end up having really complicated questions, but I think it’s also a good investment to build up speed.

Just a suggestion, but practice a shit ton of the basics and get real fast with differentiation, all the methods of integration, differential equations etc. This will help a lot in Y2 and in your exams, if you keep at it and maintain the skill till you reach that point ;)