Drawing Hair as Blocks, Not Strands
Hair drawn strand by strand looks like wire. Hair drawn as a few large masses that flow from the crown looks like hair. The skill is not rendering; it is grouping.
Find the crown first
All hair grows from a point on the top of the skull, usually slightly off center and back. Mark it. Every mass of hair flows out and down from that single origin, and if the flow is consistent the style can be anything from spiky to soft and still read as one head of hair.
Block three to five masses
Divide the hair into a small number of big shapes: a front section over the forehead, two side masses, and a back mass. Draw each as a single flowing silhouette before you add any interior line. Overlap them so they tuck under each other, because overlap is what creates depth.
Silhouette the masses
Outline each mass as one shape with a clean, flowing edge. No internal detail yet.
Set the parting and flow lines
A few long lines inside each mass, all curving away from the crown, describe the direction the hair travels.
Add detail only at the edges
Break up the silhouette with a few strands at the tips and where masses meet. Leave the centers of the masses clean.
Shade each mass as a unit. The undersides where masses tuck are darker; the tops that catch light are lighter. A single soft shadow between masses does more than a hundred rendered strands.
One band of shine
Hair catches light in a band that follows the curve of the skull, not in random highlights. Place one soft, broken band of lighter value across the masses at the level where the head curves toward the light. Break it up so it does not look like a plastic wig.
Try more in Character & Anime Art; the related How to Draw Anime Eyes: A Complete Method.