Your background is amazing, I am horrible at backgrounds myself and appreciate the effort that goes into a good one.
I've drawn a draft for the two figures, and it would perfectly fit over that image, if you wanted to copy it as a layer and use it for reference.
Your legs are a bit boneless, but that's perfectly alright, and a commen mistake. The joints don't bend quite right, and are a bit over-extended. Your noses are a little droopy, and the heads, for the size of the animals, could be a bit too big, but that is more a choice of style than anything else.
Your tail is beautiful, even in draft form. It has a very natural position.
Wings never have to be accurate, unless they are on a bird, but I personally like to make the joints a bit more visible, to show the weight of a wing that size.
https://i.postimg.cc/6phHwty3/yjomh.png
I am far from great at anatomy myself, so feel free to dismiss my draft.