Community support/help chanel?

I'm glad to find out that RD is open source. But there is almost no documentation. Can you give your advice on what is the best way to get some more info and/or help?
Is there some sort of community support to encourage adoption of RD? Is there a means like Slack channel, forum etc?

I want to evaluate JetBrains RD as a potential basis for integrating JetBrains MPS with our in-house created .NET modelling environment. Our use case seems quite similar to Rider, the context n which RD was created.