What if magic could be real? (Theory craft; no novel)

Hello. I am finishing my bachelor of science in Physics and before I have too quit my youthful dreams of magic I want to give you all a picture how our world could realistically look like if magic existed, without throwing everything over we know as sciences.

Why am I doing this because I want and most likely not even 1% of users on this platform have a understanding of the sub-atomic-space or quantum field theory.
HOWEVER, I want you to understand so I’m going to be simplifying many things to a high school standard.
Disclaimer this is all my theory. If you look closely you can see that the first sentence is already a contradiction in its own.
Magic <=> realistically
Are two words that can’t be the same. But for that we have fiction :D