aw thanks ^^

I definitely recommend using photo reference and paying attention to how existing landscape/background painters choose to lay out their compositions. studying value/hue/saturation contrast is essential for a solid composition and an effective drawing! There's really a lot to say on the subject so tackling it one piece at a time is best. thankfully there's more information than ever before thanks to the internet; this video is a good brief summary, don't assume just because he's an oil painter that what he has to say doesn't apply to other mediums such as digital. Another good source: James Gurney, a deeply respected illustrator of incredible skill, also has a variety of videos and books you can check out that will take you a long way if you really work at it.

Similar principles apply to improving at figure drawing, animation, etc etc. Don't hide behind "style"; study the rules of how things look in life so you can break those rules in your art with intention and purpose. Not that everything you draw needs to be an amazing life study of course; draw just for fun too! But make an effort to try new things (a bigger background, a new pose, a hard angle) and when you do try them, really push yourself. You can do it after all, it's just a matter of learning how. Best of luck!