New members are unable to start new threads until they become full members. You need to have 25points and 15 posts before you can become a full member and can then have an Avi picture, post pictures, have a signature, start new threads, edit posts , post links that show up correctly and have quotes appear in grey boxes . This thread explains about it.
You receive a point each time another simmer presses like or awesome or insightful on a post that you have posted in a thread created by another simmer.
You will be able to start a new thread when you become a full member.
You just need three more posts and then you will be a full member :)