Hey Marcus, No need to be scared, your stuff looks pretty cool. I think the compositions are pretty good, but could use some perspective. In the first one, the fog looks the same in the distance as it does in the foreground. In the second one, the background is just as sharp as the foreground, this causes the background to come forward and kill the feeling of depth. If you are confused about what I'm talking about, look up "atmospheric perspective" that is the term for what I am talking about. Welcome, and keep posting :)
I generally love creating fanart, but I am starting to finally focus (trying lol) on strategically placing images in the composition and using the rule of thirds. I'm scared, BUT I'd like a critique and please tell me what you think. These are just a couple of my Monster Hunter series. Curious to know would further enhance the composition.
I would say reference is always your friend when it comes to the style, colors, etc. I know with anime shapes are generally simpler in design, from the faces, clothes, hair etc. The only time they generally put detail in is with muscle tone and the composition. I say all that to say, focus on simplifying the shapes for the hair and use reference from your favorite shows to obtain that style you want.