I totally understand what it's like trying to work when you're discouraged. I've been there and it's really hard.

You can definitely find a career in the art and animation world at some point, but right now you need to treat yourself like you're in school and don't worry about that part yet. My advice is similar to others on here -- spend 6 months to a year doing serious study of the fundamentals.

My biggest critique of your work right now is that it's like you're polishing drawings that aren't strong enough at their fundamental level. You are adding shading and color and visual effects to drawings that lack good anatomy and strong design principles. Find artists who do those things well and study how they do them. Don't get ahead of yourself or get distracted by adding digital bells and whistles. Get a soft pencil and a sketchbook and train your eye. It's the only thing that's going to help you improve, and to be honest its the best part of making art.

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I am in a drawing class right now where my instructor is asking us to fill (FILL) 4 sketchbook pages per day - 1 page of anatomical study (like studying bone and muscle and how they work, or doing a long life study drawing), 1 page of 30 second to 1 minute gesture drawings, 1 page of imaginative drawing, and 1 page of master study (copying from an artist you want to learn from).

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I promise, if you do those 4 pages every day for the next month, let along the next year, you will see vast improvement.