Probably the literature about ten is better these days. When I read about it, it was mostly from D. T. Suzuki. I was surprised when I attended a zazen meditation in Kyoto a few years ago about the differences. It seems (after reading about it) that Suzuki was part of a fringe branch and not telling us about 'mainstream' Zen.
I definitely agree people way overestimate what they can predict about their choices. There are a few choices you can't take back but most of the time you're continuously choosing (mainly on auto-pilot) along a path, it's not a binary choice. Like most of us could, tomorrow, stop working in software and/or move to a different country for example. It would be hard but it's not like you chose once and now you're stuck forever.