>>12922034Do you just want to get the high level concepts? Matter/Energy curves space-time. Time dilates at high velocities or extreme curvature. Length contraction, etc.
A surface level understanding of these things can be had with minimal background reasonably quickly. Most introductory physics courses hit the high notes and give simplified equations you can use for common scenarios.
If you want to really understand relativity like a physicist does, you'll need a lot more background. You can probably divide your efforts into two categories. The first one is just the math--find a good book on tensor analysis/differential geometry and be prepared to invest serious effort. Supplement your study with youtube math tutorials and stackexchange answers since you don't have a professor to go to for questions.
Once you've got the math, you're still only part way there. It turns out that solving Einsteins equations is so difficult, that much of physics is done by modeling with already known solutions that can approximately model your system of interest. Your next effort will thus be the physics side of things and learning to model systems correctly. You'll probably want a second book on general relativity. It will likely re-iterate much of the math you already studied, but ideally the focus will be on the physics.
It is possible to do, but the length of time it will take depends heavily on where you're starting from and how hard you work at it. Realistically you're probably looking at a multi-year investment to gain proficiency so don't expect a quick payoff.
