What you do is simply open workbench, and if you imported samples under installation, you will find sample processes in workbench. Simply open the process and save it as a new process. Remember to activate it.
To use watched folder endpoint, you have to open the web admin ui, and browse to Home > Services > Archive Administration > Service Management. Click on your process, select WatchedFolder endpoint and click add. Then you have to configure the parameters. You should find information i the forum, and in documentation.
Then, when you drop a file in the watched folder on the disk, the file should be processed.