The best place to check is the interest check section of your choice and find a roleplay that you are interested in joining. Sometimes looking at the roleplays will have an opening and you might find one to join there but the interest checks are the best. This is where roleplayers will start up a roleplay and find people that want to join and either in the interest check or the OOC you will submit your character sheet in the format the GM is wanting. Once you are accepted and the GM starts the IC, you can join in on roleplaying. If you need any help starting a roleplay or find one, I'll be more than willing to help you out.