If you’re in the hospital due to follow-ons to mental health issues, it might be better to get involved with an unrelated topic instead of one that keeps you mired in those same issues.
That said, there is no technical knowledge required to moderate a community. There are just some extra links you can click to delete messages, pin them, etc. The main difficulties are dealing with humans, and in your proposed community, possibly mentally disturbed humans with high potential for putting themselves and maybe others in danger. I would start in a less challenging area.