Hello, Samantha Prater.
Your art is not bad! There is definitely room for improvement, but I think it will mostly come down to practice.
The first thing I would work on is
observation. Rather than just jumping in to a piece and drawing away, maybe slow down a bit? Take the time to really look at the character you want to draw, and then look at the character as you're drawing her.
For example, that first piece, with Sakura from Naruto, can you spot any discrepancies between the reference drawing and your own? Like, perhaps, the angle of her face, the position of her eyes, where her nose is in relation to her mouth, or the right and left sides of her neck? Taking measurements (you can do it with tools, or with your fingers, if you need to!) or drawing grids might assist you in evaluating this stuff.
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You've got the overall shape of her eyes down pretty well; where the piece falls apart is in size and proportion and angle and position. Again, don't be afraid to go slow - remeasure, re-evaluate; treat your first lines as a rough guide, and be willing to erase and refine as you move along and spot new details you may have missed.
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Just looking at the piece, as you've drawn it here, compared to your reference model, what do you see? Can you spot, say, ten things that are off-model?
What are they, and how might you fix them?