Im chris, and i really like your progress so far!
Got some really cool posts there ^^
I totally get where you're coming from with your style, and I think its really cool, yet I do think some general proportion work or just studies are always a great base. I decided to rework this painting, focusing a bit on facial proportions and maybe pumping up some colors here and there.
As you can see, just little 'spacing-adjustments' can really change a face, and push the message that its actually a side view, like the eyebrow shape, and general eye-nose-temple proportions. I would also recommend maybe drawing/ painting with more staighter lines, as they can really make your piece more organic.
Overall, keep on painting Here is this 'Value mask' I created once, that helped me a few times. I saw that the shading wasnt as intense, so i of course adjusted it, and generally always use it with a grain of salt, so every face doesnt look the same.
so yea, just an insight on how i reworked this piece