Very hard to tell since a comparison of old/new should always be of the same character in same pose, etc. This helps the viewer to notice the detail changes. I can see that at least your clothing looks better.
My normal recommendations.
Recommendations for materials of people who want to draw 2d better.
Andrew Loomis: His books are considered pretty cornerstone for an artist's education primarily "Fun with a pencil" for a beginner "Successful Drawing" and "Figure Drawing for All it's Worth" for intermediate, and "Creative Illustration" for Advanced. Other books can be woven in, but make sure the ones you take on are in your correct knowledge bracket.
Burne Hogarth: He was a master of Dynamic poses and his books on them really help to illustrate movement and action.
Bert Dodson: Keys to Drawing
If you want to spend some money. This is an online lecture program that has a huge amount of information.
You must be registered to see the links
You must be registered to see the links
Has a lot of book suggestions for drawing of all types.
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Of course youtube has tons and tons of courses and videos from both professionals and amateurs on learning to draw, finding art style, etc.