I don't know what I'm doing!!! Newbie. Trying to learn how to smooth paint brush lines
So I am trying to smooth out rough edges on this image I've drawn here using a custom brush. I followed this tutorial from youtube: Tutorial
I am very confused because when I use the smoother tool (under the pencil tool) all it seems to do is create more random lines on and around the area, which is not what I'm wanting. It may be sorta hard to tell by the picture, but if you zoom into her lips, the right corner of the lips are very jagged and there's also a part toward the bottom right of the whole picture where I guess the bush thickness got in the way somehow or something because it overlapped where her hair is still supposed to be. I hope I am making some sort of sense. Please let me know if you have any advice, it would be so greatly appreciated!

