Hi,
The Classic Games Tech Support forums is only for the Classic (Legacy) games; see Welcome to the Classic Games Tech Support Forums - Please Read! .
WoW (Retail & Classic) has its own set of forums:
https://us.forums.blizzard.com/en/wow/
Once you are on the WoW forums, you can select your character by:
- clicking on your picture in the upper right corner of the screen, and
- selecting Change Character .
Best of luck in your games.