Develop Python based data processing system

We run a 4 restaurant stores selling beverage. Our business is very seasonal. We have alot of customer transaction data and would like to develop a system to analyze this data to show selling metrics and inform us best selling and lowest selling products.

Functions include:

1. Design a database which will store transactional data on AWS
2. Design a reporting dashboard to show weekly best selling trends
3. The system will allow registrations of users based on code provided