If you're interested in gardening or ecology, the entire Solarpunk instance (slrpnk.net) is full of great munis for you:

!farming@slrpnk.net

!diy@slrpnk.net

!zerowaste@slrpnk.net

!composting@slrpnk.net

!reclamation@slrpnk.net

!cdr@slrpnk.net

!animal_husbandry@slrpnk.net

!soilscience@slrpnk.net

!diy@beehaw.org

!greenspace@beehaw.org

!righttorepair@midwest.social

!right2repair@discuss.tchncs.de

And I think the following is a comprehensive list of cycling munis:

!utilitycycling@slrpnk.net

!bicycles@lemmy.ca

!bicycling@lemmy.ml

!bikecommuting@lemmy.ml

!bicycle@lemmy.ml

!chibike@midwest.social

!fuck_cars@lemmy.ml

!bikewrench@lemmy.world

!bicycling@lemmy.world