First things first, your legs aren't actually that bad. No one can tell you what is right and what is wrong when drawing anthropomorphic legs- because furries do not exist in the real world. You can study animal legs depending on what animal you are drawing, make them straighter (to look more human), and there you have it. It mostly depends on style though. If you're going for a more realistic furry you may consider doing actual animal legs- aka digitigrade, a more cartooney one might look more human-like or plantigrade. One final tip I have for you, is playing with the tail. Having it down for such a dynamic pose is a little boring, you can play around with poses for the tail to make your drawing look more interesting and fun!
I hope this helped you a bit, happy drawing (:
I hope this helped you a bit, happy drawing (: