The community is quite active, I think. Most chatting is happening on Slack. Lots of articles/tutorials pop up on Dart Academy (https://dart.academy). For Slack details and other means of hanging with the community, check out the Community Page (https://www.dartlang.org/community).
https://www.dartlang.org/community most discussions are on Slack. It's a bit unfortunate because one needs to register but it seems to be the platform most Dartisans are comfortable with.
Spend some time reading their docs. Dart has language, Web and Server tutorials specifically for beginners. The style of writing in which they build up to explain simple concepts to things like method chaining just click. Its very natural.
Go is minimal and great for people already experienced.
I felt Dart docs were centered around human problems and Go around CS problems.