Learning to draw to become an illustrator

[Zearthus]

As for drawing faster, don't worry too much about it. In fact, the more you do something, the faster it becomes without you realizing, because of visual library and repetition. Reason it takes longer to get something in the start (this something I learned from instrument as well) our brains aren't used to what we're learning. But after continuous repetition the process becomes easier in our brain, which in turns lets you do the thing without thinking about it.

Hope to see more from you, since you already know what to practice.