Thanks to all of you for your help. I believe that I have managed to transfer all of my photos from iPhoto to Photo. Now it is time to use Photo Help and continue to learn the new system.
Now a new issue has arisen. In the past, I would open iPhoto, I plug the USB cable into my Droid Maxx, and upload my photos. I just plugged in my phone while both iPhoto and Photo were open and my new photos were waiting on iPhoto waiting for me to upload them. I closed iPhoto, unplugged the phone, reconnected it and nothing happens in Photo. I checked with Photo Help and these are the instructions...
1. Connect a camera, iPad, iPhone, or other iOS device to your computer with a USB cable.
(My phone is currently charging)
2. Make sure the camera or device is turned on and the camera is set to the correct mode for importing photos.
(with the Maxx, nothing other than plugging in the usb was needed)
3. Open Photos (if it isn’t already open), then click Import in the toolbar.
(When I click import, the box opens up that I was using earlier to export from iPhoto but I do not see an option to import from my camera)
Note: The Import button only appears when a camera or storage device is connected.