You're doing some very very specific jank things that make me worry you might be like a friend of mine who has a condition where they can't mentally process straight lines. Every single thing they drew was sort of
slanted, until they just gave up on trying to copy traditional media and forged their own super sketchy drawing style that leaned
into the jank instead of fighting it.
To be clear: This is not a Surface problem. This is an Anatomy/Perspective problem.
Assuming you don't have any medical condition, here's a quick paintover so you can see what you're doing wrong. (Sorry it's blurry. I was trying out Krita's Distort Move brush.) Yours is on the left. Correction is on the right. The main problem is their right leg (stage left.) It's sort of slid off to the right from where it should be. If someone tried to stand this way IRL they would fall over. Also, their right foot looks like it's floating or in the background or something. Both feet should be on the same horizontal line, much like how you made the tops of the eyes on the same line.
I might not have gone far enough. Is their right leg meant to be straight or slightly bent like their left leg? Post the reference you used to draw this, if possible.
That aside, I actually do like the style. I like the shapes you used to make the face, and the hairstyle is cute. I don't think it's sexy, so adult content might not be the best use for it, but I could see something like Adventure Time or Steven Universe drawn in this style. Or Scott Pilgrim. Not the movie, but the comic it was based on.
Overall it's a cheesy, cute and fun visual style. But you definitely need to learn anatomy and perspective if you want to make something that mass audiences will find hot.
