advanced action for dummies

this is what I need - just a very simple, clear-language step-by-step instruction - I haven't found it.  I've read blogs, watched you tube videos trying to explain it, I havee "elearning uncovered for captivate, and still, I just don't get how to create a simple advanced action. Every person who explains it seems to assume I know what a variable is and how I would link an object to a variable. All I need to do is have two actions for a click box. I want it to trigger an effect, and display the success caption and proceed to next slide (after pausing for success caption). But I'm lost. I  just to set up need one condition (user clicks on a particular click box), but I have no idea how to set up that condition. There's not a single explanation that I've come across that is understandable to me.  - What's a variable? What woudl it be equal to? Is there something wrong with my brain? any help would be really appreciated! (i'm using captivate 9)