I like this drawing I think is really cute. One thing that seems that might improve this specific drawing a little more is to add more variety to your linework. This might add to the sense of cuteness as well as the sense of the objects interacting to each other. For example, where her right hand and her chin touch i would expect a little more heavy line work to show this interaction. Also in the interaction of her feet and the floor. (Sorry i do not have a tablet with me to draw over, maybe next time). Also the head and the neck need some correction but it is hard for me to point out exactly what. Probably, the head feel a little bit elongated. I wonder if you use reference to inform your decisions, you do not need the exact pose but you can try to study similar poses to understand. the pose better. As a not so related to drawing skill you said that you were very tired to try again. Learning to stop one self to come back later and do a better work is an important and not so easy skill to have. However, maybe you did this in a day and you did not have much more time to rest and finish the drawing later. I do not know :P