I see. I don't own a notebook computer, or more commonly said as laptop, but I might need one once I become fourth-year high school student or so. My computer crashes too nowadays, but I don't lost anything. In my case, it has something to do with the video card, and I'll probably get another one someday next month.
You'll get the hang of it; try first looking at a certain thing or picture and try to draw what you see. That's how I did when I was young, and I'm pretty good know at drawing things now! However, I'm having trouble drawing people, specifically the body parts such as the hands, feet, head, etc. I could only draw cartoons or inanimate objects.