You can find discussions about different kind of problems and requests, as well as announcements and useful guides. You can also open a new topic if you need help from the community.
If you have a specific request or you would like to report a bug, please open an issue in GitLab for the respective subproject.
Developer Mailing List:
Mailing list of the developers. This is the least preferred way of communication, please use the other options if possible.