Main page opt-in form questions

Hi, I have a couple of questions about the Black Rider theme opt-in form on the main page.

1) How do I connect the form to a mailchimp.com account? Is there a way I can post the code from Mailchimp to the Black Rider theme? This will help me automatically input people to my list on mailchimp.com

2) When people submit their name, email and message on the main page form, how do I send them to a separate page once they click submit? For example, a "Thank You" page.
OR
How do I change the text and font color of the text they see upon submitting the form? Right now, it has the default "Back" button and the message "Your Message has been successfully submitted and mail sent" This text appears white so it's hard for the person to see. I attached a screenshot to show you.

I also attached a screenshot of what I see in the Theme Options for the "Lead Capture Settings" and I see an option to modify the Thank you text or put a link to the Thank You Page.

I hope to receive a reply soon, thank you!

 

Hi, I realized I posted the question in a wrong forum. My question is about Blackrider theme. My apologies, I will post the question there.

Thank you