I have a decent sized library of probably around 2-300 books, and it has been on my list of projects to-do to make a catalog/database for my library to quickly reference what I have. Do any of you catalog your libraries and if so what do you use for it?

I know Libid and LibraryThing are two of the big website/app ones, and it could be done with a Google Sheet or similar, but I was wondering if anyone here has any experience before I really get started.

Here is my goodreads, I accept every friend request I get, add me! I like seeing reviews from people who hang out in similar places as I do pinned above general user reviews. Warning, if you don't have many friends on there I will flood your activity feed (but hopefully this thread changes that anyway)

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So I have a have maybe a few hundred books at home and I think it's time I put together a collection of what I have. I'd love a database of author / title / publication year / physical location that I could search through ideally.

Is there software that can help with this? I had a brief look at LibraryThing, but I think it costs money for the quantity of books I'm looking at. I briefly toyed with the concept of making my own app that could scan an ISBN to speed up the process (since most will have ISBNs). I wonder what the people of Tildes suggest? Has anyone here done something similar?

I usually generate ebooks in two ways. One is to export directly from Emacs Org-Mode with ox-epub. That doesn't give me a lot of control and export options are a bit of a crapshoot. Sometimes they work, sometimes they don't. The other is to export from Org-Mode to either odt or docx and use Libreoffice Writer to export to EPUB. I will then open the ebook on Calibre to fix the metadata, the table of contents., and generate a cover.

That works fine for my personal use, but in the near future I may need to generate an ebook that looks proper and professional. I don't even know what "proper and professional" really means for an ebook, but I assume there must be tools and practices that are universally recomended that I am not following.

Hence the question: are there "pro" tools for authoring ebooks? Are there any rules, standards, workflows, or guidelines I should be following? If those exist, where can I find tutorials and documentation on how to generate the best books?

EDIT: I use Windows and Linux.

Thanks!