Hey there Jimbob6723,
Thanks for reaching out to Apple Support Communities. Congratulations on getting your new iPhone 11 Pro Max. I understand you’re having issues using the Camera and Messages apps. I’ll be happy to help with this.
First, there has been an update to iOS 13.1 that was recently released. If you haven’t updated already, use the following links to help you back up and update your iPhone 11 Pro Max:
How to back up your iPhone, iPad, and iPod touch
Update your iPhone, iPad, or iPod touch
If that doesn’t help, please go through the steps in this link to help with the camera issue:
If the camera on your iPhone, iPad, or iPod touch isn't working
Cheers