Originally Posted by Cfw828

It doesn't appear because you don't have a high enough reputation yet. You have to get a certain amount of reputation before you get a signature. I'm sure you'll get enough in no time, but for now you'll have to wait.

When you get enough points, you can do other things like changing your custom title.

Just remember not to postwhore because the mods won't like it. Welcome to the board and don't be afraid.