I love drawing dragons! Okay, something I noticed was how the neck connects to the head is a little bit off. For dragons, I like to reference lizards and birds, and on both animals you'll notice the neck has a smooth connection to the head. So it's almost like they are merged and have the same width, if that makes sense? Like it will come directly out of the top of the head like a snake. Maybe a snake should've been my first way to describe it? Hope this helps, and great drawing have fun :D