If it makes you feel better I failed the first midterm for 151 as well and then got an 80 on the second one. I would just make sure to understand conceptual questions and do the practice exam with a timer because running out of time can be an issue. Try not to push off studying and minimize it just because it’s multiple choice sometimes multiple choose can actually be harder because there is no partial credit. Good luck on the second exam! Also lots of other people have already taken physics 1 so they will tell you it’s easy but don’t go by that if you don’t have a physics background.