I did quite a few bedtimes alone when DD was a newborn, but I can't really remember much that didn't involve nursing both. I'd nurse one side-lying whilst the other lay on/over me to nurse. Which one did what depended on who I'd thought would fall asleep first and whether I was planning to sleep too or planned to stay up. Once the side-lying one was asleep I could roll over to properly nurse the other to sleep or I could get up and take them to the other room to sleep or I could get up and take the baby downstairs. Sometimes I also had the 4 yr old snuggling me to sleep, in which case DD had to be on top and then the two of us would have to escape out of the middle of the sleeping boys.
I think naps are pretty different to bedtime, so, um, don't be too discouraged?!