Welcome to Android Central! There's no paying for Google Photos on its own -- you need to pay to expand your Google Drive storage beyond the usual free 15 GB using the Google One plan:
https://one.google.com/about/plans
Any photos that are already backed up to your Google Photos will remain safe, and won't suddenly count toward your Google Drive storage. Only after June 2021 will newly backed up photos start counting. Remember that this doesn't apply if you have any Pixel phone up to the Pixel 5.
And no, there's no cheat to get around this (and even if there were, we certainly wouldn't allow discussion about it on this forum).
Please register on this forum, which will allow you to engage in discussion more easily, as well as post images.
https://forums.androidcentral.com/as...community.html