Humans, arguably some of the smartest and most capable who've ever lived, have worked tirelessly over 400 years to produce the corpus. I don't think you can really learn it all in 9 years - I think a normal bright person will take 20 and even then only have real intuition about parts of it. Most of the modern young wunderkinds of physics are ridiculously good symbol manipulators, and pay little to no attention to intuition.
just start with the Feynman undergraduate lectures (listed). The easy-mode of that is "Six Easy Pieces" (read it on kindle) which are the easiest 6 lectures.
At some point you'll need math, I recommend https://www.amazon.com/No-bullshit-guide-linear-algebra/dp/0... (I actually started here), and for calculus, "No BS Guide to Math/Physics" by the same author. These books both include a review of high school math (i.e. trig) which i needed. For DiffEq I currently recommend Logan's "A First Course in Differential Equations", this is where I am now and I found this the most gentle after trying several textbooks recommended from r/math. Context: I am an adult with an engineering degree from 20 yrs ago.
Given how heavily mathematical physics is this isn't surprising. Some mathematical concepts themselves can take a couple of months to learn to a sufficient level, especially if you include the prerequisites.
