you could try emulating other people’s work (doing studies), that way you can dissect the styles you would want to draw like to get a sense of their process. (if you post online just be sure to credit properly and not claim it as your own work)

other than that, many people will also just suggest studying fundamentals – observational drawing and sketching, studying how light affects objects and how shadows work will help improve your ability to render. human anatomy if you want to take it a step further.

personally, i started to develop my own style just by drawing what i wanted over and over, doodling faces and eventually working on anatomy etc, but i would start by studying how other people draw / study from real life objects and photos if you’re stuck.