As others have pointed out, maybe look for a hobby.
Take baby steps towards becoming more involved in the things that youre passionate about. Housing affordability, the climate, and other things are on everyone’s mind these days, and maybe there’s something there that you have some strong feelings about. Look for virtual municipality or state/province public consultations about those things (e.g. new housing development consultations), and lend your voice to it. Meet new people with the same ideas.
Tldr, Try to make some of your free time into something self-directed, constructive and fulfilling (instead of passive algorithm surfing).
I think another big difference is Lemmy still feels like it is inviting at least a small amount of conversation. Whereas Reddit increasingly feels to me like it collectively prefers to upvote only one correct answer, and stamp down everything else.
I think with federation in general we have more of a chance to preserve what we value in each instance. Whether that is constructive conversation, or cited responses, or memes only/ no memes…
I look forward to being a part of multiple, quite different feeling networks of communities.