This fic is great!
I will start saying what can be a problem for some people, the author can be quite long winded (I believe is the term, the explanations take a while), it's not bad and easy to skip if is not your deal, but the story (keep in mind that at the point I am writing this there is only 6 chapters) focus a lot in how Harry learn things so the explanations make sense. And second, this is kinda a system story, I know that this can be a turn off for some people, but is not like "harry wake up with a system" kind of story, the system work like a type of acclumency, his mind organize itself in this ever evolving (still just 6 chapters, so ever evolving can change) kinda of system, it doesn't give quests and stuff, but can make him very powerful, not op.
Having said that, the story is great, Harry doesn't seems like a adult in a body of a child, something that happen way to often in fics where the MC is or start as a kid. His progress is fun to follow, not having those insane jumps of abilities. The writing... I can judge, I am not a native speaker and if it's not a MTL I hardly notice a difference in grammar. It's way to soon to speak about stability of updates, but the author have a stellar track record, so I not worry of this being dropped.
If something change I will probably say it in the comments of this review.