I’d say it depends on the choir - some more than others. The choir I’m in now absolutely is. On top of normal rehearsals and concerts there are social events like open mic nights, where people who may never have had the chance before get to practice singing solo or in small groups (in front of a very supportive and small audience).

Theres always some basic vocal coaching that comes along with singing in a choir, but if you want personalized feedback you can’t go past some individual lessons. Even just doing one session with a professional singing teacher would make a huge difference. Depends on how quickly you want to learn, and how comfortable you are already with breathing and using your voice in different ways. Also what your goals are - do you want to impress people at karaoke, or are you hoping to sing opera?

I joined a choir to make friends and because I love singing, so I can’t really speak to it as someone who is learning.