By far I'm no expert. I'm only new to drawing. But a little tip I can give that I notice a lot of people doing wrong is that they are outlining the whole image instead of letting the contrast do the work! For example just because a image shows black doesn't mean it is solid black everywhere, there are lots of different shades. Every little detail helps 👍🏼 I hope this makes sense. Ps This only applies for photo realism.