NW really works from the command line. If you wish, you could only use commands.
However, for a 'newbie' it is not easy to understand the full structure.
With respect to the logs you will find them in the /nsr/logs path. You either have the file daemon.raw which contains everything or you can proceed to the appropriate ../policy/workflow subdirectories.
For your specific idea may I suggest that you use the daemon.raw file and filter the output for the appropriate string.
Keep in mind that the daemon.raw file has variables which will be converted dynamically. Therefore, to see usable content, do not use a standard editor but NetWorker's nsr_render_log command as shown in this example (for Windows):