BEFORE AND AFTER resources used: picsart, phonto, polarr
1. in picsart, crop your image to 512 x 800 or 256 x 400. then, add the stickers/image you want to overlay.
2. select the blend tool towards the bottom and play around with whatever one looks best with your image. then, select the eraser at the top and erase what you don't want to keep. (for this style i like to just erase the parts covering the face)