From what I've experienced so far, classical mechanics (well, newtonian since I'm still on K&K) is very difficult. It gets even harder because I have no teacher and my next math class is honors algebra 2 (I already know calculus though). I'm able to solve problems (I'm on chapter 3 about applying Newton's laws) but only barely because I almost ALWAYS get it wrong before looking at the hint or answer. Is everything else I study after this (E&M, QM, Thermo) going to get easier over time or does it all get harder? I'm wondering how I'm going to go through Griffiths and Purcell when I find K&K this hard. I'm not giving up though, as I can't see myself doing anything other than physics. Will everything just get harder? Because keeping up is slowly being a problem; e.g I have to spend much more time on a couple of problems now than I did before.