Wow, absolutely smashing me. I have just moved across to EBooks from physical books because of travel so i have very very minimal books atm, slowly buying them all.
Calibre
For discussion about the Calibre ebook management software.
I have around 7,750 books in mine at the moment. A significant chunk of this was a collection of sf and classic novels that a friend gave to me about 12 years back - boosted by a couple of smaller collections later.
I also have around 2,000 physical books and am slowly thinning those our by adding ebook versions to Calibre.
As for an Android app, I use "Calibre Library" with mine - usually downloading through that and reading in ReadEra.
Do you have a link for Calibre Library for android? When I searched I didn't find it.
ATM 760 titles I don't load everything into Calibre. Just things I might read or want in my calibre-web for friends and sync'ing to my Kobo.
I have on library stored on my NAS drive. It contains magazines and for the most part TTRPG books. Only about 200 in total. I run a calibre-web in a docker container and connect thru Tailscale using the Firefox browser so that I can just read what book I need based on what game we play. The magazines I access in the same way but on my phone when travelling.