check experience league

Are you seeing any log message

One solution is to look at using a message service such as Amazon SQS - AmazonSQS (AWS SDK for Java - 1.11.665)

Funny how things work out. Now i am part of the AWS team after working on AEM for 7 years.

This would all be custom development. There is no mention of this integration in the AEM docs. If you need help with this, you can always reach out to AEM consulting. 

Are you talking about creating editable templates dynamically? It sounds like it from "create a template dynamically using the sling model response"The best practice is to create an Editable Template (or more), create AEM Components using Sling Models, then in your Editable Template(s) - you set the...

You need to purchase Document Services.

I would use a sling model for this requirement.

If you do not know how to create a custom workflow step, or use an AEM API within a workflow, or other workflow-related tasks - such as using an OR split - see this DEV doc - Adobe Experience Manager Help | Invoking an Adobe Experience Manager Custom 6.4 Workflow from a web page

Do you mean if your resource is the Payload of the workflow? Typically to perform operations on a resource via a workflow - you can use the AEM APIS. You would use the Workflow API to create a custom workflow step. Then you can use other APIS - ie - Asset API if the payload was an asset.