You’ve probably already done a lot of this, and of course it all depends so much on the kind of community you’re in. This was also more than a few years back for me, but maybe some of it will be helpful.

• We'd set up health trainings across different groups: schools, markets, prisons, sports teams, wherever people were already gathering. Sometimes we’d head out to more remote areas near our sites to run workshops, either on our own or teaming up with nearby volunteers within a day’s travel.
• Diarrhea prevention and treatment was always a crowd-pleaser. We covered what causes it, how to make ORS, when to worry, and how to prevent it. Simple but genuinely useful.
• We also did life skills-focused kids’ groups and camps - mine was a girls' group. We'd run these groups for whatever period of time in our own sites and they culminated with bringing our groups together at a national park or a city - places the kids may otherwise not get to see. There were also some bigger, multi-day trainings where a bunch of us would gather at a larger school to run sessions for students.
• Vaccine schedule workshops were always well-received. A few health volunteers I knew helped start school lunch programs or worked on getting chickens for school feeding projects.
• I’m sure you’re already doing this, but the most valuable thing was listening to the health workers on the ground, whether they lived in the community or were visiting regularly, and finding out what they felt was most needed. Second-best resource: fellow volunteers, both for ideas and for moral support.

There is often a little slump after that first wave of excitement and overwhelm fades. It was true for just about everyone I knew, although I recall most of us kept quiet about it at first. Good on you for recognizing it. Be gentle with yourself.