I’ll chime in with the communities in my new instance 4wd.social:

• !4x4@4wd.social : pretty self explanatory. 4x4 related discussion.
• !overlanding@4wd.social : discussion dedicated to overlanding / 4wd touring
• !dji_drone@4wd.social : DJI drone related discussion, photos or videos captured

Experiencing the other side of this having just built a new instance. As the communities get closer to 50 subscribers, all I can think is “post, post, post”