How Do I “Tidy Up” My Photos Library and Storage?

I am confused with Albums/Shared Albums/My Albums in Apple photos. If I delete a shared album will it automatically delete the images from my Photos Library. I do not want to delete the images from my Library but I do want to delete the shared Albums and also reduce the number of My Albums. ie some “tidying up” of my own Photos structure. Many Thanks Neil (UK)
I have 3 large photo libraries stored on remote HD’s. I used Aperture for many years and moved over to use Photo app several years ago. Also use iCloud (2TB) and Dropbox(2TB)and family sharing.
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Neil ST (UK)