Not possible, contributors wanted.
Search the forum.
Whonix does not have a XMPP room, and if you ask an individul person, they may not have all answers but as you are sending the message specifically to them, they may feel obliged and discomforted to respond…
Not trying to say nobody will be friends with you on XMPP, just saying that you should not wait for that to start your journey.
This is my friend, the wiki Whonix Documentation, GitHub - Whonix/whonix-wiki-html: https://www.whonix.org/wiki/Imprint.
Search past threads with keywords you’d like https://forums.whonix.org
Spend a lot of time reading the available material.