Event Landing Page with Auto-Reply

I’m putting together a single-screen landing page that will introduce visitors to my FREE upcoming course, outline key event details, and—most importantly—capture their information. The page needs an embedded form that asks for name, email, contact number, and date of birth (with room to add new fields later). As soon as a visitor hits “Submit,” the system should trigger an automatic email confirming we’ve reserved their place.

Here’s what I need from you:

• A clean, responsive design that matches the course branding and works flawlessly on mobile, tablet, and desktop.
• A form that writes each submission to a secure back-end store (MySQL, Google Sheets, Airtable—happy to take your recommendation).
• An email workflow (SendGrid, Mailgun, or comparable SMTP) that sends a customizable acknowledgement the moment the form is completed.
• Straightforward hand-off materials: source files, brief setup notes, and any API keys or environment variables clearly labelled so I can swap them when moving to production.

If you’ve built similar pages in HTML/CSS/JS, WordPress, Webflow, or another lightweight framework, let me know which stack you’d prefer and the approximate timeline. I’m aiming for a quick turnaround so we can start promoting next week.