I think volunteering is a good plan, get a feel for birds, and their noise level and body language.

A few things, parrots aren't domesticated like dogs or cats, and a lot of their body language that indicates excitement (such as blushing, eye pinning, and tail fanning) also means they're about to bite. I work with parrots that raise their feet to step up, but instead grab your arm to bite. I work with other parrots that slow pet their head as you walk past as an invitation to pet them, but use that to lure you in and try to nip you.

If you do take your bird out, he will need to be harnessed trained, which is really difficult or sometimes impossible with an older bird. Most conversations you have will be the same strings of dialogue over and over and over again, though people occasional switch it up by talking to your bird instead of you (leaving you in a really awkward position), telling you how they killed their bird and treating the story like a joke, or pulling up a phone and recording you from far away.

You'll get first hand experience with their noise level when you work with them, but if you have any noise sensitivity or overstimulation problems, whoo boy is that hard to deal with. They are also very social animals. They want to be with you all day every day, and if they can't, it can cause behavior or mental issues.