Hi S.T.M.

I would also encourage you to join a community type choir, maybe even a couple. Just sing very quietly at first, and get used to it. It could take many months, or even more. Listen to others around you. Take it easy. Listen, listen, try to match notes. Have individual help with this if you need to. Doesn't have to be a singing teacher. Just a friend.
Don't give up, but accept where you are without judgement.

Tangledwood [again!] You don't live in the Brisbane area do you? 'cos ! went to a workshop last Saturday where exactly the same thing happened. Though I had heard this idea before.

Andrew   A Cappella Choir director.