Hi there. You should se some feathering on your masks when you cut elements out to prevent the edges looking so sharp and pixelated. It's particularly noticeable around the hair. Also, the text in the last image isn't very legible. I can just make it out but I had to get close to the screen.
I like the style that you are trying to create, however I do think you may need to feather the clippings of yourself more.
Also the black writing on the third image needs to be perhaps a lighter colour (white?)