hey jennifer, good question. for AI engine opt, you definitely want to make sure you've got your basic `Organization` schema down first. then it really depends on your content type.
if you're a blog or news site, `Article` schema is a must. for e-commerce, `Product` schema is super important. and if you're a local business, `LocalBusiness` schema is kinda essential.
also, `FAQPage` schema can really help surface your answers directly in search. imo, those cover a lot of ground to start with.