So here's the deal. This is likely a bannable offense, although if you're glad 1, I think it's much less likely for you to get banned since there are plenty of those in basic(not in beginner mind)
1. Go onto a character that can go into basic or beginner(depending on which you want to get into)
2. Press the arena button
3. Press basic or beginner
4. Wait for it to disconnect you
5. Go back to the same channel
6. Switch character (to your glad 1 or whatever)
7. Press change channel*
*If it doesn't work the first time, keep pressing it until you get connected