I've recently guilt my project bass completely from 2x6 boards of pine. Just scrapped em together, and started working. It was incredibly valuable as a practice session.
Don't use the cherry! That wood is quite nice and certainly valuable as an actual instrument. Just go buy a length of a 2x6 or 2x8, and "build" a guitar from it. It's scrap, so you can make mistakes, redo things, practice the neck pocket a couple times, practice shaping the radius of the neck's back, and practice the volute and how big you want it.
And when you make a mistake on the pine board mockup, you won't feel bad about wasting the cherry.
Another benefit of the pine model, is checking for balance and comfort. You might find you want the forearm contour deeper or shallower, or the top strap button further forward, or relocate the control knobs, or countless little adjustments to your design.
It should cost you $15 for an 8 foot section of a 2x8, and it will prove valuable by the end.