I wanted to add, that face is not derpy, her eyes are ever so slightly too high, that's all that's wrong with it, it's actually pretty good, you've actually got potential as an artist and i'm not speaking from a place of ignorance, i consume digital heart in great quantities almost every single day and have done for over a decade. The one thing i really want to convey to you if you doubt your own abilities is something of a mantra in the art world: "every great artist is a crap one who never gave up". Also, on that note, an extremely valuable image i insist on sharing with any and every artist i see doubting their abilities:
View attachment 12338
I share it because of just how important it is to artists, i don't need it, i have absolutely no skill or talent at making art whatsoever, absolutely 0, but over a decade of evaluating art i've learned enough things to know the importance of that mantra. Would i save your art as it is now? No, i'm viciously picky, but that's completely and utterly not the point, i'm only a consumer of art and all the art i love and enjoy is only possible because low skilled artists kept going until they got to the point where my aggressively specific tastes took notice of them, they got there through hard work and myriad techniques, this is one, read it, think about it,
know it and you will find yourself more equipped to appreciate your own abilities and capabilities whilst maintaining a motivating direction to grow in.
I see potential in your sketch, potential that could blossom in to a artistic ability that catches the eye of someone just like me but a decade behind, you could very well turn in to an artist they discover and add to their follow list, gleefully looking forward to the next work you produce that they can snatch up and add to their collection. Please don't dismiss yourself like that again.