MOA/MOA and mil/mil are the same thing, they're just different incremental angular measurements. You already know that.
Simply put, 0.5 mil is about 1.75MOA, 1 mil is about 3.5MOA, 0.1 mil is about 0.3MOA, etc. The only time you will likely even have to think about that is when holding off for wind or elevation. If you're dialing it in, just tell your ballistic app to spit out the corrections in mil's, and twist the knob to the requisite marking
FFP does take a little getting used to, but I have a feeling you're going to love it once you get your head wrapped around it.
