Feel free to join the CAP Project room on Pokémon Showdown if you want to interact with other members of the project in real time. We welcome newcomers on the project, and look forward to your active participation. Come join the fun!
According to what's written here, you can join the project as a newcomer. Make sure to read the whole article properly for more information! As said, you need to go to PS! Cap project room to join up. Hope this helps.
