In my opinion this is not a do it yourself job. I've watched it installed and there is definitely harder than it looks. Plus the pieces are cut on a plotter for precision cuts. If you wanted to spend your time learning how to it, waste a bunch of product in the process and end up with a less than professional outcome, have at it. I'm a do it your self person and pretty good with my hands but this is one job I leave to the professionals.
Also, I wouldn't buy any of the paint or interior protection products from a dealer, the are all money makers. I can spray a can of leather or carpet protection on myself and I know how to wax a car.