Here are additional resources to get you further up to scratch with Galaxy.
Galaxy servers, clouds and deployable resources
The Galaxy Chat rooms use a chat system called Matrix. For this you need a Matrix client, such as Element. Some instructions on getting started with Matrix are here.
If you don’t want to install a new chat client on your computer you can use the web version of Element at app.element.io. Once you have your Matrix client set up, you can navigate to the chat link as shown above to get a list of Galaxy Project chat rooms. One of the most useful for people learning Galaxy is the Galaxy Training Network chat room.