You should be able to go to your profile (not extended) and scroll to the bottom, and add your exact location on the map that you see there.
Thanks for asking about becoming an MIT Master Trainer. We are currently in the middle of this year’s course, but look here (and on the App Inventor website/facebook/twitter pages) for information about next year’s course. We try to run it once a year, usually starting in February. I will post something on the forum when we have dates and information for next year’s course.