How have you been studying for problem-solving based courses previously? You can’t get through physics on memory; you really have to work through a lot of problems to get your head around it. Have you been to office hours and/or tutoring? Is there an upper-year student that is willing to give you study tips? It’s hard to give advice on how to improve if we don’t have the base state.
As for Calc 2 vs physics, it sounds like the profs you have, probably have two different styles of teaching such that the Calc 2 makes sense to you but the physics doesn’t and you’re not sure where to start when trying to study. If that’s the case, google the name of the topic or type of problem that you’re trying to solve or learn to solve. You will find many YouTube videos and blog articles about basic concepts and these can be really helpful if the problem in the course is a style mismatch.