New to the game so hope I am explaining this correctly.

Got a reward from a chest and I think its telling me to pick a random scenario card. Problem is I don't know what the means. I have googled it and read from the rule book and I am still confused as to what I am suppose to do or how to set it up.

Hoping there is some script that can help me out like so many other things this mod has done but if not can someone point me to a video or try to explain what the heck I am suppose to do. Explain it like I am 10 years old and have a learning disability...because I am starting to think I do.