Simply because you don’t know where you’d be teaching yet, I would hold off on looking for a home to buy considering your search perimeters regarding walkability/transit. Like I could suggest Fed Hill to you because it hits all the marks you’re looking for, but if it turns out you’re working up in Clifton Park then that walkability nor MARC access isn’t going to help much to get to your school.

I would suggest coming back for suggestions once you know where you’ll be working.