Hawthorn and apple are not the same tree, or even close. We have both in our backyard.
If that's your first stave bow, you've given yourself a real challenge! It's small diameter, and very twisty. You have a lot of work ahead!
I made one bow out of apple, and it turned out reasonably. I cut some staves green, and had a bit of trouble getting them to dry without twisting and warping, and keeping them from checking badly. I made the bow >45#. I don't think apple is up to a narrow profile, heavy draw weight type of bow. I think it would take massive set. The bow I made is a flatbow, and as I mentioned, it turned out pretty decent. IMHO, apple is not ideal warbow material.