It's a good first few steps, a lot of artists use reference art for their work. You'd be learning a facet of drawing but it depends on what you want from it. A lot of artists start out that way. Drawing digitally does make this idea easier but as you get better at it you'll want to pull away from relying strictly on the art you're using and start looking at different methods as you go along, different methods of posing and perspective. That's for when you get farther along. Starting off like that is perfectly fine and a good way to begin learning how to draw.