It would inherently be broad, but it should be at least enough people have the tools to start understanding themselves and others. A bit like talking about sexualities in school. You can't explain every kind because it's deeply personal, but you can explain some of the components(attraction, libido, sex repulsed or negative) and some examples of how people generally fall(straight, gay, bi) with an emphasis on how you can have an experience outside of it. In thr same way they used to have family life classes, and some Christian Schools still teach something like that. Make it less cringe and let people know a bit about how relationships can work and generally affect people.