I moderate a mainly German-speaking (English and other languages are also welcome) OpenTTD community on Feddit. Questions about OpenTTD can be asked there. I will also regularly inform about the current development status of OpenTTD. I hope to welcome more people to the community soon. Here is the instance agnostic link !openttd@feddit.de
Alternatives communities on others instances for information: !openttd@lemmy.zip and !openttd@sh.itjust.works