Single mic recording was a learning experience. We were just trying to record some practice tracks for us to work with during the week and we were eventually able to do that, but the recordings were a little rough around the edges.
I finally invested the $25 for a boom mic stand a couple of weeks ago, so that gave us some flexibility in mic placement. It was just 4 of us seated in a tight circle but it took a few tries to get things balanced out. On the first few tries the harmony vocals were drowning out the melody, but by swinging the mic a little toward the lead singer and then leaning in or out as needed, we managed to record a few keepers.
Like everything else musical, I’m sure it will get easier with repetition.