I also heartily recommend the book that the author of this piece recommends. I'm currently about half-way through it, and the reaction to my drawings from my family has been: "Wow! I had no idea you could draw so well."
While this can be a revelation for some and improve drawing skills a bit, it is simply the first step. There is absolutely no way around learning how to draw but putting many hours into it. And drawing can be very exhausting. At first, you won't have the patience to sit through a drawing for more than an hour or so. It gets better though.
The drawing of the OP is okay, but not particularly good, but then he never claimed that it was good but just a way to relax a little bit. I will try this. Drawing as a mental break from coding. But you could probably achieve the same result with music, taking a walk, doing some physical activity, meditation etc.