How can I (as an adult) learn to do a handstand?

You need to be able to stay tight and keep the correct alignment. You can read tips and watch videos of how to do handstands and handstand drills here which will help you with that: http://aescougarcheer.com/Cheer101/tumblingHandstC...

Make sure you work with a spotter so that you don't fall and hurt your neck.

Good luck and have fun! :^D

ok first of all you have to have strong arms and be light weight compared to your arm power I thinck who ever can bench more than there own weight they can do the hand stand but it takes allot of practice.....but do what I just said and you'll do it i promise.....I'm 18 I weigh 165 lb I bench 237 lb and I can walk on my hands for about 5-6min but I practiced allot and someone helped by holding my feet at first