Science and all that

I hear a lot of buzzwords like test, trt, libido, estrogen, testolone. Where should I go to learn about all these things in my body. I can't find anyone in this sub talking about what these things are and how they relate to bodybuilding. All I know is chicken, rice, eat protein, sex with dudes. Can anyone genuinely explain this to me in simple terms or will I go through a Wikipedia rabbit hole to hear a lot more of stuff and know a lot less.

2 Inches soft, 3 Hard