The best way to go about is to stick to the Q posts. Pick some interesting posts (watch some Q proofs to find some of these posts). Then what you do is start off explaining how someone anonymous claiming to be an insider dropped information - in the form of puzzles and cryptic messages.

Then you can introduce some of these posts as examples. Then talk about how these posts turned out to be true (Q Proofs). Talk about basic outline of what Q was teaching us: Prevalant corruption everywhere, dishonest media acting as propaganda, string of coincidences that are hard to believe are coincidences etc.

Open up question about what kind of mechanism would keep such a corrupt system in place and ensure no one steps out of the line. Vaguely hint it must involve pretty drastic blackmailing.

Talk about one of the issues pointed by Q was to do with human trafficking and bring in stats about abducted children and recent news of child traffickers busted.

End it with how Q has encouraged people to seek out truth through critical thinking, and while not everything we discover is true, it also helps us understand what is not true as well. Talk about how media has been extremely one-sided in its coverage and works really hard to suppress anything important from reaching the people, and they just smear any Anons as tin foil wearing conspiracy theorist.

End it with the importance of free speech (perhaps pick a passage from declaration of independance)