Hi Jon,
The part at the end, "1> /dev/null 2> /dev/null", redirects all output to null, so you could remove that and enable the email feature if your host has it. It may be automatic. Any output when the cron task runs should be emailed to you. You might see things such as "File not found" (no wget available), "Access denied" (bad password), etc.
If you want to run the task more frequently to test it you'll want to make sure you have no followups on lists with real users to avoid sending them email, then you could change the timing to * * * * * to run every minute, or */5 * * * * to run every 5 minutes, temporarily. You'd need to disable the 24-hr restriction on the Dailymail page in LMP as well.
There are other ways to test wget and cron such as with custom scripts that is more involved. For such hands-on support please visit
https://listmailpro.com/supportRegards