this one is a bit more serious than the other one, fox tails are usually drawn in a more simplified way, but in reality they are fair more complex

in case you don't like this kind of style there's always this other one https://www.furaffinity.net/view/4130698/

i'm kind of a self taught, i used photographies to learn how to draw, and i've only had few base teaching (from an extremely annoying weeaboo) about anime anatomy and then watched a small tutorial of how to draw fur (which i only learnt the first part about clumps)

hope someone may find it useful

the fur on a fox's tail is way darker than the rest, with a particular scent gland located shortly after it's base, whose it's position is marked by an even darker spot of fur