- I've added you to it so that way you can check out the skeleton mock-up I did. My advice is to start with a really simple sketch, and then add in a skeleton on top of that and keep in mind proportions and the lengths of different bones in comparison to one another in order to create a balanced-looking critter (dragon or otherwise), then flesh it out with the muscle, and then add the skin on top of that, keeping in mind that skin doesn't usually fit flush to muscle since it needs to be flexible to allow for movement.
Hope this can help a bit!