This is just me coming right out and saying it: magic would be an awful thing to have really exist. The simple reason why is because of how depraved people are without it. Think of the kind of things that get blamed on magic and the occult and it more than likely doesn’t exist.
Now imagine if it did and some of those things were being given credence and supported by an actual real world force.
Imagine someone crazy in that way a genius is, but also willing to be passonate enough that they start trying their spells and things on themselves. Now imagine the results that it would garner.
No, magic is probably a thing best left for story book worlds.