So, I realized that I get really discouraged when I try to do really clean, polished artwork. My skill is just not that great yet. However, my rough sketches actually aren't that bad and I can do much faster.
So that I can get more used to drawing and actually feel a bit more satisfied in my work, I'm going to primarily focus on the rough sketches for now. Over time, as I get better, it will start getting cleaner and more polished. And eventually, hopefully it will start looking really good. :)