When you create your SharePoint List configuration in AEM Forms CS, create a FDM based on this data source and then you can use the invoke FDM step in workflow

Once you have setup form data model for share point you can use the invoke form data model step in workflow

May be submit to workflow the workflow will have two steps- one to insert data in crm and other to insert in share point 

Make the submit button hiddenadd another button on the form and on its click event store the data in crm and on success trigger the click event of the hidden submit button which submits to share point 

You can open the xdp and save it as static pdf then it should work with Adobe sign 

When you say not compatible what errors are you getting?Save the file as static pdf and it will works with Adobe sign 

Correct using the style editor and the state of the component in the best option 

What is the use case for changing the color programmatically?

Try using the style layer and then select error state and style the text box accordingly