>>776351I whipped up this proportions guide. It's very useful to know how body part relate to one another. I like to use the mass of the cranium as the base unit. So the head is about 1.5 units, the torso is 2, the hips 1.5 and there's a 0.5 gap between each section.
Those three are like the core of your figure, so it's good to start with that. You can practice just drawing boxes that fit these proportions, and try different angles and positions to start getting a feel for the proportions. It doesn't have to be those exact units. The Japanese style often makes the heads a little bigger, the torso smaller. But it's a good point of reference.
