Child-Parent Process Flow (Actor model)

Questions & Help Questions
1

I am new to elixir and have gone through much of the initial learning materials (books and courses). As a first project, I would like to recreate this service fabric (actor model-type framework) sample application. Specifically, I am looking for advice on best practices to implement the Child-Parent Process Flow and aggregation using the elixir concurrency model. I have a way forward with the API and dashboard parts of the application using phoenix.

Sample app architecture docs

Thanks in advance
Brent