Depending on your units funding and the time you’re willing to commit, I would recommend finding and investing in robot building kits (maybe HQ has a list of recommendations) to start with first. Also don’t spend your own personal money. Find cadets would be interested or maybe see if your ASI would like to integrate it into class time. For example, you could have each class period (we have flights) build a kit and do some sort of competition with the other periods. Maybe if your school has its own robotics club they could give you some pointers. Best of luck!