The SAT/ACT accomodations and a diagnosis of dyslexia will probably get you DQ'd.
You seriously need to check into this before you go any further.
It's possible that you could qualify for AROTC.
Regardless of your college major, for NROTC you're required to take Calc I&II, Physics I&II ( both of these are the the same ones the engineering majors have to take) and Chem. I&II.