I'm thinking of getting a cat.  Do you know much about cats and what breed I should get?
I'd try to get a Manx cat if possible. I love cats because we have a lot of mice around here and they're very good at hunting vermin and other rodents.
Are they easy to maintain?  For example, do you need to take them out on walks daily like how dogs need their exercise?
Well some are house cats where they just stay inside all day, but you can let them outside and they'll walk themselves and be able to find their way home probably.
Sounds dangerous to have them out about by themselves.  What sorts of food do I need to feed them?  Also - do I have to cat train them to pee/poo outside?
Well they have quick reflexes and sharp claws, so they can protect themselves outside. Simple cat food is fine and you can train them to use a litter box.
Sounds like a dream pet - they catch mice/rodents and effectively is self-managed.  Sounds like a great idea.  Can you let me know why I would want a Manx cat and not other breeds of cats?
Well Manx cats have elongated hind legs so they're great at hunting vermin, and I like how they have a small tail or even no tail at all, so I don't have to worry about them getting it injured.
Do they shed a lot of fur?  Also, can they sleep on their own or will they sleep in our bed?
They do shed but it depends on the individual cat. They can sleep on their own and I'd avoid sleeping with them as they use a variety of vocalizations (purring, hissing) so they may keep you up.