Looks like a very good first bow, good job! Tiller may not be perfect, but it looks like you're not far off. Maybe both midlimbs could bend a bit more. But hickory can handle a lot of abuse and is thus an excellent choice for a first bow with a bit whacky tiller.
One thing I would recommend you, is to lower the braceheight of the bow. The string looks too short, resulting in a braceheight that puts too much stress on the limbs. Braceheight should be about 6" from the belly of the handle. What the braceheight here? The picture may be distorting the view...