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Ok, joining the chorus. What I think I have to add is this: There are no final decisions. Try it. If you hate it, move on. If you love it, good for you. You can always go back, or maybe your taste for adventure will be primed and you'll go off and do something completely different.
As someone in the tech field who's done a lot of interviewing and hiring, I'd be delighted to interview someone who said, "I was a grind for 4 years at MegaTech and then decided to be a flight attendant because I was bored. That was fun for awhile but I'm back."