One exercise for a better understanding of light in drawing
Understand the light and how it affects a subject is the main difficulty when you want to draw a person, an object or a landscape, a good exercise is to draw a landscape and study how the light will interact with the elements at different hour of the day, trying to understand wich part will be enlighten and wich surface will be darken, how the shadow will be represented in the environement.
1/ Have fun, make it with pleasure
2/ You need to draw something with shapes et multiples surfaces, (a face, an object or a landscape work in the same way, this is the same rules) here we have a landscape.
3/ Start with 4 differents shades of grey ( you can have as many as you want ) + white
4/ Try to think what part of the drawing will be affected with a shades of grey because of its placement
5/ Try with colors
6/ The limit is your imagination