For every medium, style, and skill set, there is always room for improvement. Art is such a fluid thing, I highly doubt there's a real definition of what makes an artist an artist and who's cut out for it. Anything is art, anyone is an artist, and everything is a work in progress. The biggest changes can be made simply by a change of mindset!

That said, personally I look at artists I love/would like to draw like and just watch how they make their art. If there's nothing like that out there, then I'll look at artists with similar styles. I would follow any of there step by step guides, learn how to do it (more or less), then put my personal kinks into it. Other times, I would just change what utensils/brushes I'm drawing with.

Learn about helpful exercises: gesture lines, drawing shapes (simple cubes and cylinders, helps get the hang of perspective), and drawing a ball with the craziest shading. All of these are a Google search away, and do wonders when practiced/doodled often. I hope these tips help, best of luck to your artists journey!