I hadn't recorded myself singing until I chose to send a contribution into one of the 'zoom choirs' during lockdown. Done it on a instrument quite a bit.

Yes, it was embarrassing to hear what people had been hearing. However, simply settling down and sorting out the worst bits on by one means it gets better all the time, and so do the bits that were not too bad.

And starting off as bad as I did the words were firmly embedded in the brain long, long before it was presentable.