From the list @bjkmom posted, it appears that the place to target is UMass Amherst’s architecture school where there is a concentration in interior design. The question of course is whether it is too late to get in for next year. I assume the school of architecture is competitive and could be full. I think you should inquire about how to get into that program. Maybe you could start at Umass Amherst (or even Dartmouth) taking GenEds or more general art classes, and then transfer into the program next year.