Now it's a matter of sustaining and slow growth. Hopefully. Best thing you can do to see Lemmy succeed is participate: comment, post, doomscroll All+Top Hou ;)
It'll take a while for some of the smaller communities to get critical mass. And that's okay, probably. Critical mass is here for the larger topics already. I'll do my best to help :)
One of my favourite things about Lemmy is the "New Comments" sort mode. It's great for finding those discussions.