An important thing is to sketch out the volume of the whole hair before you go into details. You can start putting inside shapes into it once you have the mass volume.
The way I draw Meg’s hair usually varies between these two types of curls (though I think the 2nd one is technically kinky and not curly but don’t hit me if I’m wrong, it’s not like I know hair terminology)
The 3rd drawing is how I’d draw light colored curly hair in a hurry. (TBH that looks less like the girl’s on the bottom and more like it was curled with a curling iron but that’s because I didn’t draw enough small twists. Sorry, I didn’t want to spend my morning drawing hair lol)
If all else fails you can always look at how it’s drawn by someone else and see if you can translate that into your style
Sorry I don’t have that many different examples. Other than Meg’s usual do, I don’t often draw curly hair. Here are three pics where her hair is more curly: (x), (x), (x)
AngelMihe 