Go to the photo section under settings and set to optimize. This will quickly push all of your photos up to the cloud as needed but Leva thumbnail of the image. Tapping on the photo as long as you have an Internet connection will download the full resolution photo as needed.
also look at your apps even on apps like words with friends I just saw that using one gigabyte plus on someone’s iPad. For apps like words with friends you can delete the app and then reinstall it without losing relative data that you probably don’t care about. Rinse and repeat with the other apps