It's easy for somebody (like me for instance) that's not experienced in a particular craft to tender their remarks without fully appreciating or understanding the difficulties involved in the work.

And I should say, that for a novice project, it looks fairly ambitious.... probably more than I would be able to tackle!

With that in mind, I'll offer my comments as objectively and constructively as I can.

I think the general design is interesting and pleasing. I like the color of the leather as well. I might be inclined to make the flap a bit bigger though.

The closure device will be important to the look as well. I've wondered on occasion, what a kilt strap and buckle might look like as a sporran closure. Just a thought.

I agree that the leather appears to be pretty thick. Perfect for a wide belt to match the sporran though. Here's a silly question.... Is it possible to shave the leather down in thickness (like taking the filet off a fish) at the flap to make it less stiff?

It may be the photo, but the overall symmetry appears to be slightly off.... if so, that's something that's easily dealt with on subsequent projects with careful measuring and layout revisions.

The fold over on the leather loop at the back looks a bit oversized, and it projects out from the leather back. Personally, I'd be inclined to make it without the fold over, but that's just me.

That's about it. Personally speaking, these are the issues that I would be addressing if the work was sitting on my workbench. Other than that, it looks like a fun and productive hobby you've taken.

Hope that helps!