1. Um, no, that's not true, depending on how far the person pulls the arrow back and how short the arrow is.
2. It IS resting on his index finger. Oh, and, btw, ever heard of a recurve bow? I have one. It has no restplace for an arrow. None of mine have, and I've had four. They're not like composites.
3. That part is true. The hand should be holding the very end of the arrow rather than the feathers.
Granted, it may be a bit off, but it's the overall picture that counts. It's very well drawn.