How do I change the profile picture at Twitch?

I urgently need to change my profile picture to Twitch my dad already wants to search my cell phone today I have a picture of me although I'm normally not allowed to show pictures of me now but the problem I can no longer reset my profile picture but I don't want Twitch now either delete if I want to change my profile picture then Twitch automatically goes back so I mean Twitch does not want to change my profile picture what do I do now and how can you change it

You have to open twitch on the internet, just google "twitch desktop mode" there you have more settings than via the app. Then you go to your profile in the top right and then to Settings, that will be shown.