To me, this is probably the hardest manip to make. But in the end, it's worth it!
The first step is to erase what you don't need from your png. DON'T press the check mark yet.
Compare your png with the original picture. The original picture is brighter so I have to change that. DON'T press the check mark yet.
On the top left, you see a wand. Tap it and find the option "Colors". Scroll through the options till you find brightness, and adjust it. It also has saturation and contrast if you need it. Press the check mark when you're satisfied.
Then move the head where you want it, and press the check mark.
I made the picture black and white, because the pictures doesn't match that well.
I noticed that the original picture has texture. So I pressed "Effects" and "Artistic." I selected Oil and I erased everything, but Andrew's face. When you're done, press the check mark.
Once I was done with that, and add a blur effect to make everything blend nicely.