Adding an email submit bar to a shape in a container

Hi,

I was wondering how to achieve smth like this in the header image where there's a yellow shape but instead of adding a search bar, it would be smth like: Get the latest job offers and then include an email submit bar. Just started out on Mailchimp and have an embed code but it's not working with the "code" or "embed" block.
teojobs.com/new-hp/

Thanks