Ideally your answer is a sub that you are currently posting to but few others are posting to.
1·4 days ago- Promote it on !communitypromo@lemmy.ca and other communities like !fitness@lemmy.world
- try to revive it by posting a bit
- if there’s still not enough people, consider create a more generic !martialarts community (there’s a discussion on !fedigrow@lemm.ee about this)