Yeah, I struggle with M1 too. I have found that it is harder doing M1 past papers as the answers are so long and hard to follow (especially inclined planes, friction and pulley problems).
I actually took my AS maths last year, but I didn't get proper teaching hours and was really unprepared for the exams. I remember asking my teacher if I could not sit the M1 paper on the day as I just didn't understand it. Did sit it in the end and obviously, didn't do very well.
This year though, i have found that if you look at small parts of the question (eg resolving components of forces horizontal and parallel to the plane) you can gradually build the question up. I found that once I understood the angles and how to resolve components of forces, everything started falling into place a bit more. Try to answer these questions in stages (they are nearly always the same stages) and build the question (to do this you need to have a well labelled diagram first!). I still don't get vectors, but am working on it.