What Student want

I am developing a portal for a company, they want the portal to digitalize their work and

connect all their company functions / departments and make an efficient workflow. They

offer b2b services so customer also can sign up and then the IT department will approve their

request and activate their account.

Thee technology they want to use is: HTML, CSS, React js and node and mysql db.

The problem is i'm not familiar at all with backend development. I need to make Architecture

diagrams, but I do not know where to start. I will be using Amazon AWS and Microservices

approach. Can you detailed Architecture diagram which will include AWS services like aws

RDS, EC2, etc...