I don't know if you are doing it "wrong". I am not sure if there even is a wrong way to draw. But I think there are a lot of things you could try to make your drawings more successful visually.
Forget about things like copying and anatomy knowledge if you can. Focus on what exactly is in front of you instead. Doesn't matter if it's a tree or a figure or a truck or whatever it may be. Start with a strong line of action. What may help is working more from the inside of the subject and working out. Right now I am seeing a lot of relying on the outline of the figure in your drawings, especially the 10 minute ones. Flesh out the form, don't outline so much. Right now I see heavy outlines and light shading, making your drawings look clumpy.
Look at basic concepts like form, negative space, foreshortening, etc.. Tackle them one by one if necessary, keep at it and eventually you will not really need to consciously think about them one by one. It will all swirl around in your head while you draw.
Most importantly is keep at it, learn, and have some fun with it.
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