Hi I am Adriaan,
first how do we add a signature and avatar in our profile?
Your first step is to enter the
profile page, for more details you can see this screenshot.
after that the Signature column will be visible
Enter the Code Signature that you want then don't forget to save it.
Hopefully this explanation can help you, and Adriaan increase your activities so that you can post a more attractive signature.
To add an avatar you must have a minimum rank, which is Full Member, currently you are still a Newbie and still have a long journey to use an avatar.