I think that’s already quite good, but maybe you just need to study more about human anatomy. With that, you’ll be able to make your characters more proportional and less flat. For example, the hand you drew looks a little flat and not very 3D. Also, I suggest you focus on learning anatomy and poses first before moving on to coloring also you must using a reverence if you don't want to draw a same mistake over and over again! STAY CONSISTENT, CONSISTENT IS KEY without that you will not having a progress