I was wondering if....

I made some winged races I want to have play tested .. their not finished but I'd like to see them play tested. problem is I don't know how to gm. is this an appropriate place fore that. plus I have an idea for a class.

Probably a better place would be "Looking for a Group" forum, since this is what you intend to do.

If you are looking to discuss your class ideas then there are some other sites that are more viable for that discussion. If you are looking to create a group to playtest your idea then the  LFG forum would be a good place to make your LFG post. From the Roll20 Community Code of Conduct : The Roll20 Forums exist to discuss topics directly related to the use of the Roll20 program. Anything that more fittingly could be discussed on another website SHOULD be discussed there. Here are some good places to discuss this topic: /r/rpg /r/dnd /r/dndnext /r/ADND /r/Pathfinder_RPG /r/gamemasters