The facial proportions are good, what you would want to change is: to make the head smaller or the rest of the body bigger, so it would look proportional. I often have such problem too, when drawing in a small format a upclose piece, it's easy to resolve it by making a rougher sketch of a bigger piece of the body in total, like to the chest or waist, and only THEN you zoom or cut the sketch forming the composition you wanted to see

