If you're looking to go really in-depth, purchase a few anatomy books- humans and animals both can help.
Being an ass, I wouldn't recommend tutuorials. That helps you draw in *their* style, not your own. Develop your own technique and it'll be far easier. Although looking up tutorials to get proportions right and the like is a good idea.
For ideas, try drawing a 'base' of sorts (head, legs, wings) and then stop. Step back, look at it, then think.
How can I make this feircer?
What can I do to make this the most unique mamma'jamma I've ever seen?
Add things you'd see on less spectacular animals- a roosters crest, a peacocks tail or markings, webbed forelimbs...
Let your imagination have fun a little