Decomposing monolith into microservices

Domain-Driven Design (DDD) is still a starting point for anyone embarking on this journey. ...

Select your first domain to transform. ...

Separate data first. ...

Modularize code next. ...

Introduce a reverse proxy. ...

Build microservice for the domain that you've identified.

https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-decomposing-monoliths/welcome.html