Fediverse, I need your help!

A friend of mine is looking at ditching their Facebook page. I want to suggest them 3 Fediverse instances they would enjoy but I have no idea how to go about it myself since I never had to go through this process myself. They like TTRPG, Transformers, social justice and live in Philadelphia and I'm taking suggestions.

Thanks in advance!

#Help #Fediverse #LazyWeb

Edit: So far https://dice.camp is a strong contender, still looking for 2 additional suggestions.