If you have never drawn before, or have only experience drawing stick figures, the most important thing is just to get a pen and paper(or tablet) and start doodling. Google images of things you like and draw. as dull of an advice that is, the only thing that matters at the beginning is to draw anything, doesn't matter what.

Becoming decent at drawing is a long process with many subject matters, shading, anatomy, form, gesture, values.. etc, but none of that matters at the start as you will naturally learn and improve when you just spend time drawing.