Welcome! To build holsters, I would look on you tube at Adam's leather works, EDC, and Andrew's leather work to start. That's where I began and have done pretty well. It all boils down to tracing the gun, measuring, then determining a stitch line. I do mainly pancake holsters, and use a pretty basic formula, width of slide + thickness of leather divided by 2 gives me how far to draw my stitch line from the tracing. Its It's easier after you watch a video or 3. I also started off hand sewing all of mine, and wet molding without a vac pump. You can do very well with minimal tools. Just get started. Have fun!