Sjohnsone

Good afternoon. This is my first post on this forum. I've been doing leatherworking for a few months and attempting my first messenger bag. I'm trying to figure out how to make an exterior pocket for it but it's perplexing me. I made a sort of rudimentary gusseted one, but I can't for the life of me figure out how to make a clean exterior pocket that will be hand stitched on. Please help!! I was trying to make this a gift for a friend. Thank you for your time- Seth