Hard to say I'm new at this as my father kept fish for many years, but on my own this would be my first tank.
Aside from the standard Bettas
I have a 20 gal tank with adopted fish, large L001 pleco, large Blue botia, smallish Clown loach and a few white cloud minnows.
Its rather cramped and I'm definitely trying to find homes for the Botia/Pleco and probably the clown loach too.
Just looking to expand my knowledge right now and slowly modify/better my tank