Well at my school they had all the pull-yourself-up-by-your-bootstraps sorts of courses in the first three years, and by junior year only the serious students were left and then it was a lot easier. I was severely challenged by second year dynamics, I just had never thought like that before. Dropped the course, took it again in the summer, still could not work the problems fast enough, dropped that and took it again the fall. Did fine. I had done so many dynamics problems by then I had a 6 inch deep stack of notebook papers alone. Couldn't believe it, but by the end of all that practice I could do problems like a champ.

Just try and regulate your studying so that you always put in some minimum number of hours studying after class every single day, including Sunday. Take Saturday and do something else (fly). Be shameless about asking for help, even from friends. Go the library and find your classmates there and ask them to pal around while you do problems. Don't worry if you are truly lost early on in the semester, that's normal early in a course. If you are on the semester system it must be early, so stick with it and study. And schedule some flying lessons.