Welcome to the site.

If you're interested in the casual section, there are two ways to find RPs. There is the sub-forum for group interest checks [url=http://www.roleplayerguild.com/forums/13-casual-interest-checks]here[/url]. Also found on the main page in the Casual section. 
[img]http://i.imgur.com/BSVpDdK.png?1[/img]

You can also check to see if there are any running casual RPs (found in the Casual RP section) that are accepting new players. They can be found by following this easy step. Check to see which RP has the tag [i]APPLY[/i], in green, and ask in the OOC tab if they're still taking characters. Sometimes the GM doesn't change the status from Apply to Full, so it's always best to double check first.
[img]http://i.imgur.com/tmsH0xC.png?1[/img]

Or you can browse the one on one (1x1) section [url=http://www.roleplayerguild.com/forums/16-1x1-interest-checks]here[/url]. Which is also found on the main page under 1x1. 
[img]http://i.imgur.com/0s61tEG.png?1[/img]

Hope that made things easier for you.