Reminds me of Reddit in 2008 when I joined. Legitimate communities forming and finding their way. Wasn't super intuitive how to use or what to do, but something special.
Reddit has since just transformed into something almost unrecognizable, but its tough to beat the size and reach it's built.
On thing Lemmy is going to have to worry about is bots. I'm hoping the decentralization is a good solution to both monetization and bots. We shall see.
Meditation.
It's been shown to be a very effective remedy for depression. It's also a useful tool for getting in control of your mind. If you meditate regularly, you'll find more enjoyment in the things you're already doing.
Also, since it's just you and your thoughts, you may discover something you're interested in and find a hobby that way.