Developer: I need a email signup form in the carousel on my site.

I want to include a email signup form in the carousel on my site. If you look at my site you will see a picture of a lil girl and a red button on the image. I need to put a mailchimp email sign up form there instead of the red button. I believe this will take some code, but Im not a coder.

Any idea how to go about achieving this?

My site is iwannalearnphotography.com

Thanks,
Keith