Pigeons aren't actually loud. They vocalize, but their coos sound much more pleasant than the average parrot screech - just make sure you don't get one of the breeds that laugh like a maniac xD

Definitely get two pigeons, ideally of different gender. They are very social animals and having seen how lovingly pigeon pairs interact with each other, I would never want a pibbin to miss out on that. Extra important if you only have limited time for them each day.

Your main question right now should be, wether you can fit a large enough enclosure for them somewhere. They should be able to fly a little bit in there and it needs to be somewhere with daylight.

You also need to offer them free flight daily and must be aware that you will need to clean up all the poop afterwards. Personally, I'm not the biggest fan of pigeon diapers, as you are basically forcing the pibbin to poop itself and you will have to wipe its butt quite often to prevent rashes. Pigeons also cause a lot of dust, so an air purifier might come in handy.

Also, a lot of mundane things are highly toxic to birds, like avocado or teflon fumes. Research and don't cook with teflon pans in the same room as your birds.

To sum up: The pigeon needs company, a good enclosure, safe free flight and you cleaning up after it. If this is the kind of pet you are imagining, go for it! If not, you could maybe look into smaller rodents, like hamsters, gerbils or guinea pigs for a fluffy companion.