Maybe here’s a place to drop knowledge and links about xDai.
For Starts:
useful links for onboarding
https://www.xdaichain.com/about-xdai/faqs/xdai-chain-basics
https://www.xdaichain.com/for-users/get-xdai-tokens
To swap on xDai chain:
To bridge to xDai from Dai:
To bridge to xDai from other not Dai: