programming

I'm looking to sell a service through Square on my Mailchimp landing site. I have connected the two, but don't have a Square store so can't use the payment option through Mailchimp. I want people to be able to purchase a retreat on my landing page and capture their email addresses. If it's possible to do that I am looking for someone to set that up and tell me how you did it so I can do it again another time. Thanks