Kbin I'm struggling to understand how is any different than the other Lemmy instances besides a prettier interface. I do like the interface but Kbin.social seems to be the main instance and it's having some growing pains right now (server-wise) so it isn't integrating with the rest of the fediverse very well atm.
Mastodon feels like a Twitter clone, but without all the right wing nut jobs. There is a fair share of left wing nut jobs but I'm finding it easier to ignore them. Since I never used Twitter much at all I'm finding it easier to navigate/learn Mastodon but really I just search some hashtags of what I want to see, subscribe and interact from there.
As far as Lemmy in general goes I'm starting to understand the bigger picture. Mastodon is an instance on the fediverse and I can see and interact with content on Lemmy from there if I want to. I keep seeing the analogy that it's like email servers so I'm treating it like I did the early days of email, try everything until I settle into a home and an interface I like.
Undecided if I'll go back to Reddit, but there's nothing saying that I can't do both. Lemmy and Kbin both have a long ways to go, but I'm excited to see what happens. If I happen to find a few cool communities and/or make a few friends along the way then great. Always was a Twitter hater but actually having a bit of fun over on Mastodon right now (many Twitter users migrated there after Musk)