I switched midway to sort-of summarizing things after seeing what @shitsurei wrote.
Week 2: 6-12
Mia: I don’t know what to do to fix the economy and books are of no help, where is that nagging what’s his name, four-eyes. He seemed to know his shit
/Somehow finds that guy, who is right on the verge of being sent to countryside for pushing his boss too much on the subject of this country’s future/
Ludwig: Do you even know how much your meals cost? /s
Mia at top smugness: my one meal is your monthly salary! (Ha! I knew it! I was thinking about that since you asked me that in my last life, I was ready before I met you!!!)
Ludwig: o__o
Mia: *proceeds to quote the points his future self made* (I have no idea what that all means but boy was he annoying, I can’t forget that humiliation)
Ludwig: so wise 
I like how she tries and fails at thinking. And reading. And analyzing.
MCs often desperately try to come up with an answer / solution / explanation but they manage to do it and seems like with Mia we can see the sad reality of a (lovingly) pathetic girl (lol).
I like it sooo muchhhh. Failing towards success is fun.
Her magical diary from the future is updated with the new futures when she writes into the current-timeline version of this diary. Nice. I wish she could also write → check → erase → try a different thing.
Obviously even with Ludwig and financial fixes, this country is still doomed.
Chapter 10
Mia: ok, to fix the upcoming epidemic, I should ask Ludwig for advice. Thinking is an effort and like, idk anyway.
Maid: YOU NEED TO DRESS BETTER IF YOU GO TO SEE A MAN (that you have a crush on, as she assumes)
Mia: uh, ok?
Proceeds to reflect for a second how many dresses she has and sometimes grows out of them without wearing them even once. Thinks nothing of it, moves on to give us some intrigue about a hairpin she has but can’t be happy about.
A good example of her personality and a prove that she has 0 comprehension on money wasting in one chapter.
Chapter 11
Ludwig’s misunderstanding deepens. He assumes Mia is informed of his actions (to use her authority to shut his boss up) and approves them. He assumes she’s a great leader that provides a general vision and trusts the specialists to make specific decisions. He’s glorifying her so much, he’s actually considering if she is some sort of Goddess of wisdom.
I think she is not checking up on what he’s doing at all, because surely no-one is actually informing her of what he’s doing. Lol.
I wish it blew in her face, but also it’s funny and smooth so ok 
The Actual Royal Princes: Ludwig, take me to the slums please.
Maid: Please don’t do it!
No-one: your parents said no, go back to your place.
Chapter 12
So it’s only 4 (and not 14+) knights because it was such a short notice
And there it is. Informing father (the king) of your dangerous actions? Nah, I’ll tell him later, it’s whatever
Mia really shouldn’t have said the slums (Honzuki levels of) horrible smells don’t bother her much.
Ok people, what do we think about giving sweets to a starving child?
Anyhow, Mia asks Ludwig how to avoid a future epidemic here and Ludwig finally understands why he was brought here
I am ignoring the places and titles. If they are important they’ll tell me again.
Everything is Moon/Luna/Getsu anyway
