QuackVader
I think Vision should just scan the entire Sanctum’s library. If the Ancient One is opposed, he’ll stop him. The Ancient One is willing to train thousands of people who come through those doors only for healing (only to leave the Sanctum without providing anything back), and they’re willing to train traitors like Kaecilius, but not willing to train someone who protects the world? I feel as though a lot of authors refuse to give their MC magical training because it’s hard to write a story where the MC knows magic. After all, there’s a magical solution for almost anything. The problem is: no intelligent and/or logical transmigrator would turn down the chance to learn magic. So it all comes down to making a plausible reason to deny the magical learning so the readers buy it. Just my two cents.
Improve: "Magic operates as a science and profession, requiring education. Rebirth doesn't guarantee instant genius. Not all are like Doctor Strange, who can master magic swiftly. Some branches take years or even decades to grasp. However, in this fanfic, the concept of learning magic in just two weeks and relying solely on dream thinking is explored beyond the ordinary."