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.

Tonight at 7 pm Central/8 pm Eastern, there is a free workshop/training to help people learn how to make book résumés for highly targeted books. These would then go on the Unite Against Book Bans website.

Quote from the UABB website on what a Book Resume is:

Book Résumés help teachers, librarians, parents, and community members defend books from censorship. They detail each title’s significance and educational value and are easy to share with administrators, book review committees, elected officials, and board members.

Their goal is to create a process for sourcing these résumés from the community because the ALA cannot keep up with demand (and is drowning with budget cuts).

The registration link for the training is here:
https://givebutter.com/R0SVw9

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?