so, you tap on your current profile picture.
you tap on the thing that says "link a quiz."
quiz title: the random quiz
quiz password: random
when you go back to your profile page, you should see something that says "set my profile picture". if you already have something you want as your pfp, select it. if not, go get one quick.
vio, I posted some alt name suggestions for chocolate and sage in summer's thread, if you haven't already seen those. they're kind of scattered around.