Idk what your teacher is teaching in class, but you really need to have a strong conceptual understanding. If you struggle with conceptual questions you need to go back to the basics and figure out exactly the concepts you struggle with.
Once you are confident you have a good grasp of the laws of mechanics and how they apply to different situations, just do a bunch of FRQs. The variety of problems is honestly not that high. Pulley problems will work the same. Inclined plane problems all work the same. Roller coaster loop problems all work the same. If you see enough of certain problem types, you will be able to follow the same though process patterns to solve exam problems easily.