Hello. I am currently just a 2nd year undergrad, with nuclear physics being my end goal for study. However, as of now, I cannot even open an entry-level nuclear energy textbook without being totally lost. So I am asking: what background is needed (in terms of courses, materials, etc.) in order to finally be able to enter into the nuclear world? Some relevant background of what I've taken: Math: up to vector calc/diff eq./lin alg Phys: up to advanced mechanics/advanced E&M/advanced optics/basic quantum/basic relativity Essentially, what fields must I be familiar with (and, if possible, what textbooks are good) in order to have the background needed to learn nuclear physics?