"making the correct shape of the "
Trouble making the shape,or trouble knowing what shape to make?
I have built a couple of hulls in this size range,
Bead and cove strips, the same process used to make canoes and kayaks, and you will find all kinds of website articlals about these builds. Usually fiberglass covered after the wood strips are formed into the hull shape.
Bread and Butter sandwich construction, where the hull form is made from several horizontal layers of boards, generally 3/4 inch thick, glued and screwed together to make the approximate hull shape. Followed by rasp and sanding to get the fair hull.