As I work with celebs fairly often, my advice is to first do your research (google, not stalking.)
Then, be normal. Don't act too cool like you're not impressed, cuz everyone does that. Don't act all drooly, and horny teenage boy, cuz she's seen that action, too.
Friendly, helpful, respectful, but not dweeb. Funny, but not Adam Sandler. No stunts.
But you can definately introduce yourself, point out unique features of the neghborhood (best coffee place, drycleaner to avoid).
She's met 1,000s of guys. Her asshole radar is finely tuned. In her world, real is rare.
Like you mom told you, just be yourself and you'll be fine.
So, if you're helpful, polite and shirtless you should be a hit.