Juuust keep drawing. Like, I started pixel art by just making minecraft items and skins. I got better at that and moved on to actual pieces. My first few were awful, but as I kept making them, and studied the works of great pixel artists I began to adopt their methods and understand what made their pieces great. I'm not "good" by these standards, yet, but I'm allot better than I was, and I continue to grow in the types and styles of pixel art I do. Sooner or later I could possibly make amazing works. Just, keep make'n art.