Generally, point down.
Make sure your fit is tight around the legs and waist - loose diapers rarely wick moisture, and are often about as useful as having nothing at all. This will often mean different positions for different people, so it’s worth adjusting to see what works best for you.
As someone with a full set of hair down there, it’s not nearly as much of a difference in terms of leaks as some have claimed, and in my experience, shaving it can lead to significant chafing. I’d recommend against it as a leak prevention technique, personally, but to each their own.
Boosters and wraps can help, but only if your diaper is not capable of holding the load. It’s worth looking at whether those options with boosters or wraps each night are more price competitive than just investing in a better diaper, if you have control over that choice.