Gerard 't Hooft, Nobel laureate in physics has a list of resources to learn theoretical physics here: https://www.goodtheorist.science/ https://www.goodtheoris

Gerard 't Hooft, Nobel laureate in physics has a list of resources to learn theoretical physics here: https://www.goodtheorist.science/ https://www.goodtheorist.science/ Basically, whenever you become a physicist, especially a Nobel-prize-winning theorist (this even happened some to me during my non-theoretical PhD), you get a bunch of emails from cranks that believe they have "figured it out" without ever having engaged with the centuries of work and results that we are building on. So he made this reading list that he requires people to be familiar with before he engages with them. All the information you need is available and easily accessible and he just curated it into a full course.