I don't think this is a particularly bad article, but I also didn't really like it that much. I believe telling the reader the conclusion to what they're about to read, completely deflates any mystery that the next bits try to create. The next issue I have is that the article is way too short. Almost every journal entry, aka every paragraph, has a max of two sentences. It's just not enough! The first section speeds through a section used to set up the speaker's entry to the Library, which makes me think it isn't important (no matter if that is true or not). I also think the individual knowing magic is cool, but the way its written now isn't very believable.
The descriptions of the Library are similarly lacking. If I was this person, I would be freaking out. When I read that part of the story, I didn't get any sense of wonder out of the description.
I realize you've added more since posting, but that new part suffers from my previous critique as well. A warning: continually updating one page isn't great for getting people to end up reading your full story, so you should either focus on making each section long enough to warrant having separate pages or finish the entire piece and post it.
I encourage you to make use of the forums or discord for critique! It can seem intimidating, but trust me it really isn't that bad. Ultimately, because I still think it's not objectively bad, I will choose to novote. I wish you luck on whatever you decide to do with this piece!