Hola Buenas tardes/noches Beatriz, I happen to be spanish too but I'll keep this in english for everybody else jaja. So, what I did here, more than a critique it's an example of a different approach to the drawing itself, I tried to mantain the character as it is and push the features that made sense to me. When drawing the head, you always need to know the orientation of the head and the planes so you can properly add the facial features, here the eyes looked like you didn't fully understand how the eye sockets work and how it sits on the face. I also added more volume to the drawing using shadows, I feel like your painting approach might be a bit too chaotic, I'd suggest coloring cel-shaded first, make sure you understand the forms and where to place your lights and your shadows. I think, this character could work, It's fine to experiment like that while practicing your fundamentals, it's what makes it all make sense, that's why we are practicing in the first place, So I would say you are on the right path, main things I would focus on are observation (try working from reference often, both real life and other artists drawings) and Form, try to make your drawings as dimensional as possible, practice the basic shapes and start "feeling" perspective in an intuitive way. Espero que te haya sido de ayuda, cualquier cosa no dudes en preguntarme, mucho ánimo y sigue dibujando :D | Artwod Feedback