Many people have already replied nicely about how you can add avatar to your profile and explained nicely that you can do it just by following the paths shown by them. If there was a rule in the forum that a user can't add an avatar to his profile until he achieves a certain rank, you would have to accept a certain rank first, but since there is no such rule, you can apply any rank from the forum. A newbie member who has just opened an account can also add an avatar to his profile if he wants to by following the correct rules.