I can relate to not wanting to say you're smart and can't do something well. I was/am sometimes the same way. For me it was imposter syndrome plus the idea that since everyone says it how would anyone ever believe such trite, cliche pitches. Well, I've learned from experience that there's a reason so many people market themselves in such similar ways. It works. It's still unbelievable to me but it works. Plus, if it ends up being true it makes your life much easier and things just flow.

You are smart and talented though. So just say so, feel cheesy about it, and profit.