Being gone 5 hours a day isn't bad, it's doable and right now she should just sleep a lot. You are doing the right things here with the radio on, the chews and having her in a safe spot.
Remember if you catch her chewing on something inappropriate be sure to step forward on one leg with the clap and then redirect. Never ever, let anyone rough house with those puppy teeth no matter how fun and cute it is. I have had to get after friends for doing that when mine where puppies, it defeats the purpose of what you trying to accomplish. Letting your pup explore with it's mouth is normal and natural, it's those that get the pup all worked up and encourage the teeth play that I am referring to . Hang in there, we are here to help and advise!
I want people who read this to understand that those of us who are very experienced still go through the same issues, there is no one magical trick, it really is understanding how to use the right ones and lots of patience.
Jesse good job!
