Thats a great question that I wish I had a better answer to. I know a lot of people find themselves in this kind of role as they transition from other roles like general programmer, designer, motion graphics, etc. Product Design should give you a huge leg up in terms of approaching projects with usability in mind, but there are so many areas to take a look at. My early morning/still waking up response is to take things slowly and let yourself be guided by what areas you’re drawn to. Creative technology needs more product designers (if we’re talking physical products, not just screens) that can bring skills with CAD and things like that. I don’t think you necessarily need to go to school for anything additional, but probably round out some additional skills with programming (probably best to start with web focused stuff or python, but the more traditional “creative coding” toolsets could be good as well. Maybe some physical computing to compliment your product design. There aren’t a lot of resources I can think of to help with the transition, but maybe that’s something I can write about in the future. You can also look at school curriculums at places like ITP, Parsons, and any other place that is working on creative technology students. Good luck!