So unpacking your post:
- latex is for writing printable equations in a word processing document
- arxiv is for prepublishing papers before they go to a journal if ever for comment from other people in the field
- feynman lectures are great for learning from a master physicist but as time goes on they become dated
- griffiths is a standard in electrodynamics used in many undergrad courses.
- other books like goldstein's classical mechanics
- dirac's quantum mechanics yellow book
- kip thorne's tome on physics
- penrose road to reality is a good hefty read on modern physics
- gulberg birth of numbers tome for math history upto first year college
...
- CERN runs high-energy particle smashing experiments to tease out the inner working of atomic particles
Youtube channels like:
- veritaseum,
- smarter-everyday,
- numberphile, computerphile....
- minute physics,
- physics girl,
- tibees,
- mathologer,
- 3blue1brown,
- khan academy and
- mathispower4u.com
Physics concepts
- Feynman lectures online
- Susskind's theoretical minimum book series and online course series are good for people getting back into physics as a hobby. they cover classical, quantum, and relativistic fields.