The best way to learn is to ask, so...I'm asking.

I'm looking at transitioning to CSM and while I think it's a great match for my passions and abilities, I recognize that I'm coming at it as a beginner. So, I'd like to ask the question I ask everyone who has experience in something I'm interested in.  

Please fill in the blank: "If I knew when I started, what I know now, I would have done ________________ differently."