Lemmy.world is weird about posting grow pics. Dig around to about the start of my post history for pics about how grows are done on a moderate scale.

I get my strains from Denver Spore Company. (It’s googlable, again, not posting direct links cause .world is weird like that.)

Honestly it depends so much on where you’re located that there’s not much point. Just google “headshop” “shroom grow box” etc. perhaps add “magic” if you’re having a hard time finding the right ones.