Creating a sign-up form (similar to mailchimp) for a website page that is hosted using AWS (S3 bucket specifically)

Question

I have created a web-page using Bootstrap, which is hosted on the web thanks to AWS S3 bucket and Route 53.

I want to add a sing-up form similar to the forms created by providers like Mailchimp - from scratch (or with the help of existing frameworks).

The the questions boils down to:

1. How can I create aa function where when a submit button is pressed, the names and email fields are saved onto a database?
2. How can I create a automatic autoresponding "welcome" message to those who signed up?
3. How can I get this to function with AWS?

Perhaps question 1 and 2 are broad and Q3 can't be answered till 1&2 are answered. If so, do link some resources that will help me learn this specifically?

Answer 1

As you are already using AWS, I would suggest the fastest way to achieve this would be to use the AWS Cognito hosted UI.

https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-app-integration.html

Cognito takes care of authentication and the saving of user details. It then calls your application back. All you need to do is create a landing page to handle the callback from Cognito.