when you decide to ge tthe finally
watch them for a bit, make sure thier being eating, ask the guy to feed them. choose spunky ones that come up to see you
get juviniles, they are easier to take care of than adults and babys
keep 2 heaters instead of one big one. this way, if one goes bad it doesnt fry your fish because it can only go so high
have a variety of foods for them. a lot of people used color bits for normal feeding but you can use flakes too
when you get them keep the lights off a biot so they can explore an get comfortable, then only turn one light on for a little bit so they dont spook.
they will get to know you better if you sit inb front of the tank for a litle bit. and theyll come up and beg eventually
some of this may be pointless but meh