Hello there Megolonius!
You can trade with your friends in the Trade Corner forums and have some battles in the Battle Center Forums. There are many people there so be sure to make friends with them. If you wanna have a chat just VM me I won't bite. :3
If you have any questions regarding the forum you can ask any of our dear staff members via VM/PM.
Anyways, Welcome and have a nice stay here on Pokecommunity!