That background in chem really shows. Water chemistry is most of the hobby. Everything else is optional and varied. I did poorly in chem, so it's a stretch for me. Fortunately the cycle is not plasma physics. The rest of the parameters are pretty flexible as far as Betta go. Angelfish require more finesse.
I only keep three Betta right now. Just five tanks. Not too serious. I saw how much money a serious keeper can sink into this hobby. I reined myself in right away.
I did take the time to get knowledgeable about the nitrogen cycle. Coached many people through it and learned quite a lot that way. Contacted manufacturers of related products, had a short informative exchange with Dr. Tim Hovanec and such. Don't know much else about fishkeeping other than what I learned here and TFK.
Never thought about fish until four years ago. Great fun reading about other people's adventures, though. Have a deep admiration for keepers now.