Thanks for writing in!
1.) Please go to the Font Manager and add the font that you want to use for the text. Edit the page and in the headline element settings for the "Love Notes for Honesty..." find the "Text Format" option so that you can apply the font.
To know more about the Font Manager, please check this knowledge base article:
2.) Insert a content area modal in your bottom section. The Mailchimp code should be added in the modal content so that as soon as you toggle the icon or button text, the modal will open with the mailchimp form in it.
3.) You are using a classic button element. I would recommend that you replace it with the v2 button element so that you can easily style the button by just tweaking the button element settings.
Hope this makes sense.