MIke, cut a sapling hardwood of oak, ash hickory, maple, etc. work well. 2-3 inches in diameter. For a length double your draw and 20-25 % and then leave it 1- 2 inches longer. Seal the ends with poly or glue.
Look for a sapling 2-3 inches and free of limbs.. Pick out the best side for the back. Marking 2 magic marker lines to delineate back from front would help. Remove the belly wood with a hatchet. Remove the bark and tiller the bow. You can go to the floor tillering stage where the stave is bending slightly. Then, let it dry. Roughed out isless likely to warp and will dry faster. See Bowmaking Directions on my site. While you are waiting for this to dry get started on a board bow. Info on my site. Jawge