Mailchimp Follow-Up: Improve Welcome Email & Signup Tags

I already have a basic Mailchimp welcome automation and signup form connected to my website. For this small follow-up project, I need a few simple updates: Update the existing welcome email with new text and a cleaner layout... (Budget: $10 - $30 USD, Jobs: A/B Testing, Analytics, Automation, CSS, Digital Marketing, Email Marketing, HTML, Mailchimp, PHP, Web Development)