The Roleplay Social Forum, is free to join for all roleplayers and writers, however new members cannot create new topics without prior approval. If one of the staff members manages to give you a yellow roleplayer tag on your profile, then you have free reign of the site to create topics without approval. New members can also reply to any topic they wish, without prior approval.
If you wish to roleplay with someone, all you have to do is mention them within your topic, like so. @theirforumname.
If you wish to keep the topic between only you and the specific people you wish to roleplay with, simply add them as recipients at the top of the topic when you make it. This will keep the topic private for only you and those you wish to see it. Remember to mention them also in your topic, so they know you posted it and get a notification.
There is nothing super complicated about this site. Simply post what you are looking for and wait for others to reply, or reply to topics that interest you!
If you have any questions, try mentioning a member of staff and we will do our best to assist you.