Hi Capt Skully, ARGGGh - Firstly you need to model it in a suitable CAD program. Then you break that into parts that can be cut on the router. "Flat" parts are OK but the seat itself has lots of curvature so you will need to break it into pieces that can be machined (driven by your machine working Z height and fixture height) . You will also need to figure out how to register pieces when you flip it from top side to bottom side. Some features like the rebates for the legs may have to be finished with a chisel etc. Good project.
I'd model it in Rhino3D or Alibre. Then break it up into smaller pieces in the CAD then bring into Mechsoft visual CAD/CAm to toolpath it. I'd add tabs to the sides for the registration and holding, think about how to finish machine it so it has the least hand work. If you have a rotary axis you could machine them as it rolls.
A few things to consider. What CAD do you use? Peter
https://forum.vectric.com/viewtopic.php?f=29&t=17362