A level maths

Personally I think the concepts and understanding you need for M1 is harder than all of the core modules, but as long as you understand basic trig M1 is really easy. Do past papers and try to understand why you are doing something instead of just trying to find the answer. I was finding M1 really hard like you but after going through 2 past papers on exam solutions website with the walkthrough videos it started to make a lot more sense