Ask not what greekdom can do for you, but what you can do for greekdom.
I doubt anyone will tell you the knowledge they gained by pledging their respective organization...It's not for you to know, just like our rituals/secrets are not for you to know.
You say you want to be a Kappa, but only if Kappa has more to offer you than rituals & secrets....Otherwise, it "won't be worth the trouble". Huh?
Do you even know what Kappa Alpha Psi Fraternity stands for? Do you know what they are about? Have you researched the organization?
We've seen these types of "questions" asked on many internet forums, and prospectives get the same answer...RESEARCH, RESEARCH, RESEARCH and BE DISCRETE.
And fyi, you may have offended some Kappas by calling them Nupes when you're not one, so don't be surprised if a Kappa does not respond to your request.
Good luck in your quest....you're gonna need it.