Local Aquarium Clubs
Search AquariaCentral, FacebookGroups, or local fish store bulletin boards.
Monthly meetings with guest speakers, auctions, field trips.
Great source of rare locally-bred stock.
Online Forums
TheAquariumWiki — comprehensive wiki.
Reddit /r/aquariums — general.
SpeciesSpecificForums — cichlid-forum, betta fish forum, etc.
Social Media
Instagram for aquascape inspiration.
YouTube for deep learning (see related article).
TikTok for quick tips and trends.
Regional Fish Shows
American Cichlid Association (ACA).
International Betta Congress (IBC).
American Killifish Association (AKA).
Attending once builds contacts for a decade.
Mentorship
Find an experienced keeper and visit their fish room.
Offer to help with water changes in exchange for knowledge.
Mentorship compresses years of learning into months.