Take your time. Your efforts are much appreciated.

What are some pressing problems that would benefit from having someone focus on them for a few years?

I'm in an earning to give career, but am considering taking a break for a few years, after having pulled some very long hours for many years on end now. I'm looking for opportunities to contribute through labor. I could work full-time hours (which would be a significant reduction of workload compared to what I'm doing now) for no salary. Skills: management, legal, data analysis, basic coding (but could spend some time getting up to speed on this one). Some language skills as well.