Don’t just ask them to try it. Don’t ask them to research or try to understand. Just give them a link to one of the major Instances, preferably yours, and let them poke around. Give some tips if you want, maybe some subs they can sub to.
Don’t overwhelm normies with passion or knowledge though, they don’t care enough. It’s about using it and figuring it out as you go, for most people. So, just grease that process for them, that’s really the best you can do. Answer questions, give tailored recommendations, stuff like that.