Sorry friend I am a bit rushed on being able to make tutorials (and on the whole I save them for my Patreon)- but here’s some reference I’ve used and some step by steps? Finding good character model sheets online is a lifesaver and helps you understand how to ‘build’ the ducks in a way that feels tangible. For some poses everything sort of happens all at once, but with some more complicated ones I find I have to really break down the body into shapes and lay the details and cloth on top of it. Always try to keep the energy of the sketch though, and think about your line of action! As for beaks hell I don’t even know I’m still having trouble with them =__=