I'm not coordinated in general but track stands are straight forward.

As mentioned before, the key is rolling backwards.

It's easiest to roll backwards if you have a slight slope (crown of road for example). This is why a lot of roadies who track stand (like me) will turn their wheel left because that's the direction of the crown of the road (at least in the US). On the track it's actually not the correct direction, you really should turn right (direction of the race).

However, if you don't have a slight uphill slope, you can use your own mass.

If you weigh 160 lbs and your bike weighs 16 lbs, you weigh 10x as much as your bike. If you move your whole body back one inch, your bike will go forward TEN inches, because it weighs 1/10th as much.

In reality you move only parts of your body back, so you may move, say, half your body (your feet, for example, don't move, neither do your hands, and your arms and legs don't move much). Still, if you move just half your body back one inch, the bike goes forward five inches.

So move your body forward while jerking the bike back (gently). You can "reset" your bike, even on a relatively steep downhill, with a regular coasting type hub.

Some shadow demonstration: