>>1869275Just two things.
You didn't clip the bottom of the image properly. Unlock whatever layer you had the original image in and click it. With it still selected, go to Object > Artboards > Fit to Selected Art. The artboard should now fit to the original image. You can then go to Document Setup at the top right and click "Edit Artboards" and adjust the artboard to remove any unneeded space at the sides or top, without altering the bottom. Then when you are in the Export window, you can click the "Use Artboards" box before selecting a location to save it. This should properly cut the bottom part out.
The other issue is a smaller one with the blush lines. You want the blush lines to go in a certain direction, which in this case you did. The only thing you want to do is make sure you keep the tips thin, just like how you did for the tips of the hair before. So thin tips, thicker center, to thin tips again. This will give it a more delicate and soft look versus the fatter version. This is a rather extreme example, but it should highlight why it will be important in the future.
Otherwise, it is good enough to continue. Do another 4-5 anime screenshot ones and you should get the hang of it enough to start working on the harder fanart ones.
>9 hours straightHeh. Soon 9 hours straight might get you just some of the lineart done.