Hi @Natali Santini, on top of Vincentius's critique about designing the limb shapes for your figures, I think I also want to add one more critique: watch out for your proportions! Having proper proportions is one of the hardest things to nail in a drawing, so don't sweat if you might be struggling in this area. The most common pattern I see in your drawings is that your heads feel a bit too small in comparison to the bodies you've drawn. If you make them about 20%-25% bigger, then it should feel right. My critique was pretty simple so if you have any questions regarding Vincentius's critique then I can go more in depth into that principle as well. I'm sure Vincentius can elaborate if you ask them too! Hope this helps!

You're on the right track with these! And they all look great. The only general thing I can add is that you are on the right time to start introducing the squash-stretch principle into your sketches. Disney's people back in the 30s were the ones who invented this principle, and it's a great principle to have around. The principle is quite simple, for example, If you try to curl your biceps, your biceps will squash while the opposing muscle, your triceps, will stretch. And the other great thing about this principle is that it's quite universal too, that they happen not only in our biceps/triceps, but it happens very much in every part of our body. Try to incorporate this principle, and you will not have 'spaghetti' arms and legs in your drawing again!