I sewed a my first DIY with a speedy stitcher and had probably 15+ hours in that thing with the speedy stitch.
I then got my hands on a lightweight Brother sewing machine and made more of a manufactured like saddle out of an old hunting harness, some camo fabric, and salvaged webbing...sewn with Guttermans upholstery thread from Joaans. I hunted all season long out of that thing and it changed my game. Be sure to read to Sewing Resources here and do your reading on proper stitching/load bearing sets. My DIY saddle changed my game this year!
Good luck to ya!