I have a deep interest in science. My main subject of interest however is astrophysics/cosmology. I have https://www.amazon.com/Astrophysics-Nutshell-Dan-Maoz/dp/0691125848". The mathematics used are simple, single variable calculus and some ODEs, although, on the physics aspect, I feel that I'm missing the connections. Especially the quantum mechanics. I've never read a science text book on anything else besides some basic classical physics. I'm thinking about going through classical electrodynamics, quantum mechanics and then some particle physics. Maybe after all of that I can learn some real astrophysics (and cosmology). Would all of that be necessary to truly understand it all? I still have an interest in physics but I'd rather learn about the cosmos first, then learn more in-depth physics.