Good stuff Liking the imagination in here.
Do studies from photo ref that's you like, movie stills, from video stills or even game art. Just whatever you like, find and then study. It'll help you improve. Study bridgeman, hogarth and loomis combined together for anatomy.
Really spend your time on work, put you best effort into it and finish everything.
Biggest advice, finish your work, do one finished drawing a day and you'll improve like crazy
Keep it up!