I am a working software developer with 15+ years of of experience and have always been interested in the field of Theoretical Physics. My dream (as amateur as it might sounds), is to work on the problems such as ToE etc. every day after-work.
Would this require a formal course ? If yes, then where should I look ?
If no, then could I just start working through a stack of books to gain more understanding of the field ? I looked at an answer to the question "Book recommendations" and it seems to have a long list. But it seems to be a just long list without any order or focus. Any help on formulating a structured list of books (or even sub-topics) to would be really helpful and appriciated.