Right. The author mentions McDonald's as a site: I'd assume Starbucks or another coffee shop is probably a better one, since more people bring laptops there to work. Does a wall charger last more than a day plugged in at a Starbucks location before getting stolen or, at the very least, removed during cleaning?
The best thing to learn right now is how to code. There's a lot of things you'll improve on. You can develop anything that you want, and it will help you think logically.