Go and talk to an adviser at the school you want to go to (UMass?) and they will show you the courses you need to get the same training. It may not be called Interior Design, but will have the same classes. Ask the people at your office where they attended school and what they majored in. I bet they ALL didn’t go to Mt Ida. Some may have art degrees, or set design with a lot of courses in materials. If the Boston area needed people to major in Interior Design, every school in the area would offer that degree (they might, and just call it something else). Is there a community college that offers some of the courses you need?