Looks good! The one thought that I have is that the cotton thread normally used in cloth garments is not so great for leather. The tanning oils tend to rot them, which is why department store belts that are stitched tend to fail and fall apart 8 months after you buy them. With this being garment grade leather, though, it may not be an issue. It's just something for you to keep an eye out for. Waxed nylon thread is what is typically used in leather work.

But I do have to say that it really looks nice- especially for a first attempt! I look forward to seeing your next!