Yeah, definitely. I've still managed to finish it some 20 times but going in blind the first time really contributed to me loving it so much.
I'd also argue you shouldn't look too much into the sequel. Not because of any "thing" in particular but because it's more fun to immerse yourself in the game and slowly begin to unveil all the major themes of its story.
Hi! In the library I work, we use Koha, which is probably the most well-known open-source library management system. This comes with the advantage of having a big community and having a lot of answers to questions you'll probably have, albeit the documentation is kind of all over the place. Just a heads-up, though: it only runs on Linux so, whoever is going to do the implementation must familiarize themselves with it if they haven't done so already. It's not a flawless system by any means but as far as open-source goes, it's the best and most mature.
There are a few demo servers you can try on their website: https://koha-community.org/demo/
The other open-source library management system I know of is FOLIO (their repo) but I haven't tried it or read much about it. I only know it's way younger than Koha (created 10 years ago, I think) and that EBSCO is one of its vendors. It may use newer technology but I honestly don't know. You can also try a demo server if you go to their wiki.
Hope it helped. If you have any questions, let me know :).