I've decided to make the plunge and take Goldratt School's TOC Supply Chain Expert training course in preparation for participating on a viable vision project as an Application Expert. The five-week course started today and my "can I do this" concerns dropped almost immediately as I saw how the course was going to be taught. My biggest concerns were associated with learning the Goldratt "thinking processes," and these are part of the overall training.
I suspect, however, that to get really good, I will have to dive in and start using these skills on a more regular basis.