Welcome to the forums! 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. Keep posting on the different threads and sections of the forums and you will soon get the points/posts. The off topic section is a good place to post.