PLEASE HELP! How would i go about creating an image whilst implimenting a mockup pouch? I have provided a couple of examples.

PLEASE HELP! How would i go about creating an image whilst implimenting a mockup pouch? I have provided a couple of examples. picture 1 of 2
PLEASE HELP! How would i go about creating an image whilst implimenting a mockup pouch? I have provided a couple of examples. picture 2 of 2