I think you are on a good way, I find both artworks appealing and would surely buy your art if you decide to sell art here ^^

I sadly cannot really help with advices on anything else ^^""" for prices you could try to auction off a few slots, all together or through 2 months or so to gauge out how much WP community will pay for your work on average.

Though most importantly, try to not think of your art as being better or worse than others' based off of prices; it can be easy to slip into the mindset where you can feel underappreciated or see your art as bad if sales are not going as expected-how well and for how much you can sell is 50% art itself and 50% marketing, not to mention that not everyone on WP seeks art and not all of them in same quanitiy and not all of them always have funds(we can all save up though) and not all people like all styles, so it is trickier than it seems at first, but if you love art keep doing it for that reason :3