:salam2:
Welcome to TTI. I hope you find this website beneficial and participate in the various discussions across this forum.
As for your query, personal pictures are not allowed as avatar. This is against the site rules as every member's avatar is viewable to site members of both genders and it would be highly inappropriate for anyone to post their personal pictures or of their family/friends.
In your UserCp you can find a good collection of Islamic avatars. You can select the one you like best and pick it as your avatar.