Email, whatsapp, leads automation set up through landing page

I am looking for a freelancer to help me set up an automation system through a landing page. My goal is to increase sales conversions, and I need help choosing the best platform to do so. I will consider MailChimp, Google Analytics, or Salesforce for this purpose. I would like to receive regular reports on the performance of the automation, though I haven’t yet determined whether I’d like them every week, month, or quarter. The selected freelancer should have experience working with these platforms and be able to effectively guide me in creating a system that meets my goals for this project.