Re-upholstering seats

The front seats on my 66 Barracuda Formula S could use re-upholstering. I was would like to tery this my self but I'm hearing it's near impossible to do if you're an novice. I thinking of getting the Legendary Interior seat covers and replacement foam. The seat frames are like new, the car is pretty clean but the front seats are cracking on the tops of the backs.
Anyone try this at home? Any tips or if anyone know of a book or video to provide some guidance? Thanks for the input.