(Good) Ascendance of a Bookworm

Series in one sentence:
I've lost everything I've ever known, WORSE YET, THERE ARE NO BOOKS.

Series in more sentences:
A young woman with a love for reading is killed when her personal library falls down on her during an earthquake - but not before she can utter her wish of wanting to read more. She wakes up as the weak-bodied 5 year old daughter of a poor family in a different world, different country, different time.

While trying to stay optimistic, she discovers books are a rarity and reserved for the rich. She's determined to find a way to make her own books, while helping those around her improve their simple lives with her modern knowledge.

Crunchyroll's summary and the first few minutes didn't excite me, but I kept on watching because of the high ratings. Bless those ratings.

So, why was I so pessimistic to begin with? One of the first reviews I posted on this blog was of an anime about a book-obsessed boy dying with the wish of wanting to read more, and the main character shared some similarities. I don't like characters who have one dominating interest, especially not when it prevents them from shedding a tear for the people and life they were forced to abandon.
This 5 year old child is a woman, with a mother, presumably a father, and who knows what else, yet she accepted her new family pretty much instantly and her real mother is only given a quick mention at times. How is it that this new family manages to earn her tears after only having spent a year together, but not her original family?

Also, for an adult woman in a child's body, she sure acts like a child. Why is she charmed by this other 5 year old boy complimenting her hair? I can't imagine my ass blushing over the generosity other toddlers show me. This semi-romance between her and her friend is pretty inappropriate, I'd say.
Having that said, was the reincarnation plot necessary? This show could've been about a creative young girl in a magical medieval world.

But alright, enough punching the show in the face, it managed to turn itself into an interesting watch. It knew it couldn't ride on the book plot alone and inserted many other struggles for the main character to deal with.
I'm not sure what to think of the reveal at the end, it's a bit too much, but it counts as a cliffhanger.