Linear regression is dope.

As a data scientist, I often walk new clients through a linear regression exercise to convey some key concepts about the engagement and demystify what I'll be doing for them.

I'm often dealing with people who, much like you, haven't done much with stats since a college "Business Stats" course, so I get a lot of "oh yeah, I vaguely remember this" - but going through it again gives me a good foundation to relate back to as things get more complicated.