Have you tried recently? I was one of these people in high school but now in my 30s, stuff that seemed impossible no longer does. Maybe me or the context is different.
I have. I am disappointingly crippled by dyslexia. It takes a tremendous amount of energy for me to work with numbers and formulae which is one of the reasons I was drawn to programming. Once I realized I could abstract away the numbers and only really needed to get the calculation right once before putting it into a function, it was like jet fuel.
What did you try? I was the same, also in my 30s, did some online stat and calc classes, passed those classes, and I don't think I learned much. If I did, I've already forgotten it I'm afraid.