So I'm literally like a naive little sales rep

sitting here and being like, how does this guy know everything? He's telling me what to say.

He's telling me about the audience.

He's telling me about this new product.

He's launching a new freaking brand.

I was like, this is amazing.

That's what I want to do when I grow up.

What is it? How do I need to approach this interview process? What is the mentality? What are the things that I need to do to kind of help navigate if you can give a perspective on that?