If you are handy and have done some wood working you will find that leather is not that difficult to work with.
The hardest part the tooling. Practice tooling on some scrap leather. I found that the moisture content is the most critical with tooling. Keep the tooling simple, a good job of less tooling looks better than a bad job of lots of tooling.
Make your patterns out of very hard stiff cardboard, I get them from the feed store off the pallets of grain. I cut both left and right parts to help layout on the leather, then use only i of the patterns flipped to ensure the parts are equal in case the patterns are slightly different. Dont forget Left and Right not two lefts. Pay attention to where the parts are cut from the hides especially the seat. Use the blemished hide areas in the ground seat and areas of the skirts that do not show. Use quality leather, Herman Oak or Wicket and Craig. Spend a little extra and use stainless steel or brass harware, stay away from plated as it will rust in time . Take your time and work on it only when you are in the mood , I find that there are day that just dont feel right and then you make mistakes and a mess..
Have fun take your time and most important...... Post picture of your project so we can see haw it is going..
just my $.02 worth
P.S. if you build on the Ralide tree use only ring nails and screw for better holding or better yet only screws.