They can get along but you just have to be very careful. I had a copy of Guide to a Well-Behaved Parrot (a little dated now, but still written by a parrot behaviorist) where the author actually recommends getting a cat to help keep parrots company if they will be alone during the day, and recommends starting with a kitten. Now, many people here have had bad experiences with cats and birds, and cats are naturally predators, of course. But the fact that a behaviorist who had worked with hundreds or thousands of parrots would recommend cats makes me wonder if the danger is sometimes exaggerated. The bacteria in cat saliva IS very dangerous to birds, but a tame handfed parrot won't see a cat as a danger, and many cats won't see a bird as prey if it doesn't act like prey.
I had cats and birds together for 12 years. The cat was already 7 when I got Cheeky, so I did already know he was a pretty easy going guy. They got along fine, never a problem. Of course, I tried to keep them separate, locking the birds in their room/guest bedroom when no one was home. But the cat, as cats tend to do, would occasionally find a hidden sleeping spot in the bird room, and accidentally get locked in with them. I would come home to find everyone relaxed and content, the cat usually asleep on the bed. Now, I wouldn't recommend that, but my point is that not all cats are even going to be interested in birds. Also in my experience, female cats are much more interested in hunting than males - maybe from an instinct to provide for kittens.
If your kitten turns out to be a problem cat with a strong hunting instinct, then it also isn't too bad to keep them totally separated. Cats sleep 18-20 hours a day, so a cat really won't mind being locked in a bedroom part of the day.