I'm currently in the first year of my undergrad, and want to pursue Physics independently of the main Physics course. So I need to know what topics, AND IN WHAT ORDER, do I need to study to get a systematic knowledge of up to, say, Quantum Electrodynamics. (Undoubtedly this will take some time and I don't want to rush through it just for the sake of it.) As of now I have a good grasp of calculus-based classical mechanics (right now we're studying classical mechanics based on the least action principle using Lagrangians/Hamiltonians, etc.), BASIC knowledge of electromagnetism (EXCLUDING the formation and traveling of electromagnetic waves), and BASIC knowlegde of the special theory of relativity involving very elementary mathematical techniques (that is, the usual concepts of time dilation, length contraction, simultaneity, etc.). I do not yet know how special relativity arises from electromagnetism, or how to treat laws of electromagnetism taking special relativity into consideration. To reiterate, I want to know in what order should I cover various areas in Physics (as in Classical Mechanics, then Electromagnetism, then Sp Relativity, and so on...) to have a grasp of all topics up to QED. Thanks in advance.