I was surprised to discover that learning steno theory is much like learning a new foreign language due to the use of steno word dictionaries, and it takes most learners a few years of full-time study to get fast. (Of course, like with foreign languages, a small percentage of learners are able to go much faster.)
I think I'd prefer to put effort into a chording system with more predictability and less memorization (I've heard that Velotype might be a good match). Or failing that, I'd rather learn an actual new foreign language :)