Do whatever you can to try to figure out how to shave it in the direction that it grows.
It looks like most of the stuff under your chin (but not below your adams apple grows upward toward your chin. That's the way I'd shave it. The stuff below the adams apple grows diagonally or downward toward the adams apple. That's the direction I'd shave that, too.
If you shave with it, it'll feel less punitive while you're shaving, too.