This is not a completely free product, you need to buy an Adobe product to try it for free. But now Adobe Launch has provided a demo, you need to apply to Adobe partner. I think this should be an open experience for potential purchasers.

Most of your  hardcode values ​​are fixed values, using Constant Value, you can fill in more than 40 characters. 

It could be created before. Recently, I have been prompted this error: Error fetching client data! Please retry in a few moments ...

It could be created before. Recently, I have been prompted this error: Error fetching client data! Please retry in a few moments ...

I retested the time, the time will not be updated, but you should pay attention to the button in front of the library you republish is dark, this indicates which library is effective, and the library will be effective.

You need Republish, Republish, and it will be displayed in the first one, so that it means Republish.

 Authorization of Adobe Audience Manager is similar to Adobe launch, you can refer to:https://www.bbccss.com/create-profiles-and-grant-users-adobe-launch-permissions.html

Path Without Query String :/test/index.html Path With Query String:/test/index.html?cid=haran

Maybe  can  refer to Google tag manager

No need.Generally, one property uses one host, and all the environments in it use the same one.