I was a double major in college; Marketing and Graphic Design... and ended up going and getting my Masters in Design and Technology. I now work as a UI/UX Designer and love it. I think you should definitely look into UI/UX. It is an important need right now as more and more design needs are going digital. I think your experience as an interior designer would work well with UI/UX. Similar to how you might design the flow of how someone navigates through a physical space; UI/UX is about leading a user through the flow of a product with the least amount of friction to help them with their objective. You should definitely look into programs that encourage people from various career/education backgrounds. I went to Parsons and our Design & Tech program had students from so many different disciplines - even lawyers and art historians!