Google ”Quick, Draw!” is a good tool to practice drawing

Google “Quick, Draw” is a good tool to practice drawing.
This is an online game where a neural network artificial intelligence tries to guess what you’re drawing. You can draw a lot of things you may have never tried drawing there.
https://quickdraw.withgoogle.com/

Also, You need to describe the characteristics of the object in a short time so the AI can tell them apart.
That is appropriate to practice drawing simple pictures needed to visual notes.