Where do I learn more about audio stuff?

search the forums here for basic questions, then read the strings, it will go fast, and sometimes be funny has hell.

right here, but the lunatic fringe and jerks are mixed together with excellent advice and interesting opinions from very nice people, and it's up to you to screen it. Eventually you learn which posters fall into each category. Stereophile (magazine)can be entertaining, but rarely useful (just one example: their "cover story" speaker in the last issue cost over $100,000)

Get hold of an "Electronics Basics" book.
It really helps if you know the difference between a resistor and a transistor or capacitor and capacitance.

Welcome!

Check out a few audio magazines: Stereophile, the Absolute Sound, HiFi+; as well as some of the online review sites: 6Moons, Sounstage, Secrets of Home Theater and HiFi, ecoustics, Enjoythemusic, TNTAudio, DGAGGO, UltimateAVmag...this is just a sampling...

I think the best thing for a beginner to know is that system synergy is everything. The way your speakers fit your room and component matching will have the largest effect on the final sound.

What I mean is that you match you speakers to your room and your amp to your speakers etc.

You can not read a positive review and buy an amplifier (for example) and expect it to perform the same in your system as the article told you it performed in their system, the synergy between YOUR components will determine the outcome instead.