1.) Search up "textures tumblr" on google. Get a few that you like.
2.) Go to picsart, hit edit, and pick your base photo. Crop it to a square.
3.) Click on add photo and choose one of your other photos. Play around with the blends.
4.) Repeat with different photo (I didn't choose my blend yet here)
5.) Search up a character transparent, then smack their face on this square
Voila! You made an icon!
Pictures used: