2。 After studying general physics, you still have to study: of course, at this time, you'd better review your advanced mathematics again. Then I have to learn a course called ordinary differential equations.
3。 Then, learn some methods of mathematical physics, which you can also find in your library.
4. Then you can start to study the four courses of theoretical mechanics, electrodynamics, quantum mechanics and thermodynamic statistical physics, which are called the four major mechanics in physics major.
You'd better take the courses of physics major in your school, freshmen, sophomores and juniors. Then, you can ask the teacher any questions, and then ask the teacher to give you some advice.