Create an evergreen process/landing page

I am a mindset development coach and for the new year, we are launching a 21 day mindset development challenge. Every day, participants will receive exclusive content and we need to develop an evergreen process that will automate the registration process and content delivery process through systems like Mailchimp and Simpletexting. We would like to also create a page on our website where users can access information about the challenge, register for it, and automatically get set up for scheduled content deliveries.