I've only been doing leather work for less than three months. What you don't know you will learn, so don't procrastinate. The only tricky things you have to watch out for is getting your measurements right, and backing any leather you decide to tool. I use heavy duty packing tape, so the tooling won't stretch out the panels out of measurement prior to stitching it together. It helps to decide on hardware etc while designing, and I always attach everything before final assembly. It goes: design, cut, tool, punch out for hardware, stain, finish edges (not all the way to the point of dying with edge coat) attach hardware (d-rings, buckles, etc), attach interior lining (in this case I just lined the back panel with pigskin and added a pleated pocket, left the rest natural). When assembling, I start by gluing and stitching the gussets, then I glue and sew the back panel and flap, then finish with the front panel. In this case I waited to stitch on the flap that goes into the buckle last, as I wanted it to align perfectly. Good luck, you can do it! Don't have an interior shot yet, but will try and post one tomorrow.