Great to see you found it!
A great place to get started is with the Response Form, just to let us know what works best for you.
After you have filled out the form, check out the above Group Schedule, and find a group that works best for you. Once you have found one you want to join in on watch this thread during that group's time for a post from the room creator giving the link for you to join the group.
Once you join in, you can talk/chat with other artists discussing methods, workflows, or just asking for feedback. Last but not least, you are more than welcome to join multiple groups.