Taking Phys C after Phys 1 and Calc BC

Alr I just need to gauge how hard my year will be in Physics 😭. I know this class is obviously a very hard one but I’m interested in hearing from those who have gotten all of calculus and all of physics 1 done the year prior. Is mech really that hard? because I’ve technically learned all of the material conceptually already, know how to do calculus, and have gotten my 5s in both. I also heard Physics makes a lot more sense once you do it with calculus so idk need to hear thoughts. Also how was E&M is another question (not top priority since its second sem) but I would still like to know from those in similar position as me going into senior year. Thanks!