I never want to mention them explicitly to avoid them getting raided, but there is a community which came here after their sub got banned.
The sub was about an influencer, so definitely not the crowd you would expect on Lemmy.
They are doing just fine. We helped them a bit at first, showed them that there were apps, told them to remember the name of their “server” when logging in.
The community is quite active with over 150 monthly active users. They discuss their topic in their community, everything is going well.
Sometimes I feel like we overestimate the complexity of Lemmy.