>>1794913>>1794914I would go one step further and say to make sure that all your nodes are given handles, so that you can control each area of the fill as much as possible. You of course also want all nodes and handles to be parallel, and only put the nodes at key areas that curve or change direction. This only gets better with practice, so it is pretty much a given that your first few vectors will suck.
I would also recommend choosing a better anime screenshot or fanart to practice off of, considering that that show has some of the shittiest and sloppiest artwork.