You need 500 posts to have an avatar (the picture shown below my name in this post), but for a profile picture on your profile page (my profile page), you do not need any posts. You can set that profile picture here. (I do not know if it works via Tapatalk.)
Thank you very much can u do sigs on this forum ?
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Lol I better get to it lol
Yes you can, click on User CP in the top of this site, it will show you your own profile, on the left is a link to set or change it.