No, not easy, but way easier than I envisioned without knowing what you wanted to do. Tufting is not hard once you have the dimensions figured out, but that can take some time. It is tedious and time consuming, though, especially a long involved piece. I did a vehicle that was a combination of a motorcycle in the front and a Volkswagen rear end. The whole inside of it was tufted.......... walls, ceiling, and part of the seats. I thought I was going to lose my mind putting in over 400 buttons.
If I were you, I would practice on a piece of vinyl that closely resembles the leather you are going to use. It's a good way to get the hang of it, and screwing up $25 worth of vinyl is no big deal compared to screwing up $300 worth of leather.
I will do a small section and take pictures so you can see what you're up against. I can't get to it for a few days, I'll try to do it by next Monday.
No one lives forever, the trick is creating something that will.