You can check a few articles on DEV, CSS-Tricks, or Medium.
CSS drawing is a fun thing to do to learn CSS (you practice positioning, borders, shadows, gradients, transforms...), but it is not that a good fit for production (at least not for now and not for big things). If you want to do something more practical, I'd recommend SVG (and you can apply similar CSS knowledge).
There are many people that do great things with CSS: jhey (and the DEV account), Diana Smith, Ben Evans. For SVG, Sara Drasner and Adam Kuhn. And they all have projects to see/study on CodePen.
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