Tip: If you're planning on doing hair that's complex or has much length at all, use this older tutorial series from Kent. It's a short detour.

I remember this one, a not too oldie but goodie. After this one there was another one where Kent updated the hair shader material, I remember he mixed two Hair BSDF setting the reflection and the transmission as separate to control them better.

I wonder if that tutorial is in the CG Cookie vault somewhere. Yes, there is a thing as The CG Cookie vault, but if your planing a heist forget it, no one knows where the vault is, not even Wes.