I've never made anything from leather. I'd like to make some keychain guitar pick holders like the one in the photo. I'm looking for advice on some tools required to make these.

I think there are tools like; punches to pop holes for stitches, burnishing the edge, sewing, installing the snap, etc.

I have a decent set of woodworking hand tools (knives, chisels, carving chisels, mallet, workbench, etc.)

I bought the one in the photo for $5 and realize a DIY one will cost 10x more but that's not the point.