Haven't read all the replies but yes, I have had parrots before and have a rescue one now. If you are after a rescue, I assume you are looking at the national bird rescue, Birdline, where my current one came from? Previously have had an Amazon parrot (loud and liked singing opera), a bit destructive. Then, an African Grey - a bit less loud and brilliant at the pips on the radio but not so much human speech - could say hello and liked to walk round the house and play jumpng out onto your foot from behind doors - very destructive, chewed carpets and wooden furniture).and lots of alarms and wild bird calls). Now I have a Senegal parrot (from Birdline)who is quite small - a bit bigger than a budgie) and a great deal less loud, which is good, as I now live in a flat. He is very funny and loving and talks a bit but mostly in a garbled way so not exactly like a human voice. He prefers noises from car alarms, microwave, wild birds and laughing. He is still picking up new sounds after 15 years here. He will sit on the top of his cage, which is left open all day until bedtime, and fly round in little circuits very occasionally then back on cage. Just once in a while he will fly into the next room to see me. He will sometimes chew the furniture soft covers but this can be avoided by removing him or putting a towel or two on top of the chair back. I have special old clothes if he wants to sit on my shoulder for any time as he will chew holes in them. If you go ahead, you need to think about how long it might live. Bigger parrots can have a life expectancy of 50 years or more
My Senegal has a life expectancy of 35 and is now 26, so I am hoping I will still be around then so he doesn't have a the upset of going to strangers. They all like company, so you can't really keep them happy if you are out every gay for hours. of the time. You will need to find someone reliable to look after them if you go on holiday, etc. There are not many people who board birds and those that do, you need to check out as they are not all reliable. I have 2 neighbours now who love my parrot and pop in to visit him and look after him if I have to go away. You will need to know where the nearest avian specialist vet is, as normal vets know hardly anything about birds and are of no help.
Lots of household things and foodstuffs and some houseplants are toxic and must be avoided. Don't use non-stick pans as, if you burn one, the fumes will kill your bird in minutes. No nail polish remover etc anywhere near bird room, as fumes it will kill them. Foodstuffs that are dangerous are many, so look them up and keep list handy.
That said, I wouldn't be without a parrot. They all have an excellent individual sense of humour and character and are very affectionate and intelligent. When you first get them they might need a few weeks to relax and show their true selves (like all rescue animals, so be patient and give them space). Go for it (and report back if you do).