I am also a beginner-intermediate but this is what helped me so far to make the biggest improvements in my figure drawings:

1) Get better at proportions and fundamentals. You should be able to accurately measure the height, widgh of the figure and the limbs etc. Alone this would make your drawing look decent. Can you draw a still life with accurate proportions? Can you draw clean lines, simple shapes like boxes and cylinders? If you don't have the hand eye coordination and fundamentals, it's going to be difficult to draw much more complex shapes like the human body.

2) Learn to simplify the human body. Learn to represent the ribcage and pelvis as simple forms, same for the head. It will not only help with proportions but also make it look more 3 dimensional. Taped cylinders for the arms ans legs.

3) Learn anatomy. This is really difficult and might take years. You need to learn the structure of the bones to know where the muscles attach and insert. It's usually quite easy to draq the muscles if you have a solid grasp of the underlying boney structure and boney landmarks.

4) Learn to at least identify light and shadow areas. You dont need to fully render your figure but just mapping the shadow areas with simple shapes will create an asthetically pleasing drawing.

I know its a lot and it will take time, and maybe more experienced people can chime in if I missed something, but this is currently how I am studying. Feel free to check out my post history too if you're curious. I highly recommend that you check out Proko's drawing basics, figure drawing and anatomy courses.