Fantastic work, your proportions are looking good.
Try to have some more confidence in your lines. I see you're sometimes drawing a line in little steps instead of drawing it in one motion. It will make everything look cleaner but requires a bit of practice.
Good Luck!
They look great. Especially with a more manga/cartoon look. But keep in mind that you should also try to draw the figures with accurate proportions, as that might be useful for you in the future
Other than that, great job. I don't really know what else to say :)