Deezmix-gui works perfect. You can set it up in next to no time for free with a bit of googling

I would recommend Manjaro. Very beginner friendly, has access to the AUR and a great community forum where you can find the answer to any question or problem. I took the leap years back from Windows to Linux and it was one of the best things i ever did.

There is no official 1337x subreddit or discord group. Go to the 1337x official chat room (link on the front page of 1337x.to) and ask about a discord group or sub reddit and they will tell you its fake.