1. When you clone a SQL server or create out of scripts you may ended up with same instance. You need to change the instance once the SQL server is installed.
Important: Make sure the clone server has drive letter E:\ or same as the parent server. By default, SQL service cannot start if the drive is not E:\.
Firstly, make sure the sql service and sql agent are started on the installed machine. If not, you may need to change the Sql service (both) login. Assign appropriate SQL account with password, once it is done SQL service will start.
To find whether your server instance is same as the current server, execute the following command on the server sql server mgmt studio:-
If the result is different (output will show a server name and it should be the same as the one you have installed the sql server). Execute the following command (you should include the server name in the single quotes. Leave the local as it is. Leave the quote as it is.
Once this is done, restart the SQL service and SQL agent service on the server
Rerun this query, make sure you the output of the query matches the server name which you have installed the sql server