Do you mean your profile picture if yes then it's simple near where the search thing is there is also a bell and a kind of image of a person press on the person thing and then you'll see your account from then you'll understand alone if not you can ask me and I'll try to help you 
Have a great day 🤗 or night 💤💤💤 and always remember that you are amazing ❤️ (because you are!!❤️)