You must know math, history; and of course, how to fly a plane, if you want to be a pilot. However, most people in the airforce are not pilots, some are security, atc, engineers, specialists, etc. each requiring a different education. All must know math, science and if this is the USAF than you need to speak English.
Yes, you do need to be a US citizen
You do not need any schooling to be a waiter.
High schooling.
There is no schooling. just a business license. but schooling may be helpful
you need areal
anything and anywhere
The educational kind.
Trade School
you don't really need any lik type of schooling you either good or your not. You just need an agent and to know when to try out for things
None, you must have contacts.
None at all.
You will need a masters or PHD in psychology to practice psychotherapy.