Highly recommend the Golden Age of Board Games video linked by bruitist, even if it’s a few years out of date. If you can even bring a fraction of the enthusiasm and passion Quinns manages in it, you’ll be doing great.
Also to echo RossM, there are a lot of misconceptions about board games by people who haven’t really played any in the past decade or two. If you ask a random person on the street to name a board game, you’ll likely hear Monopoly, Clue, Risk, Sorry, or a number of kids games like Candy Land or Snakes and Ladders. Note that nearly every single one of these games is roll and move? All are competitive? Try to show some examples that break from this mold.
I think Pandemic is a good example to start with because it’s not roll and move, and it’s cooperative, pretty much the antithesis of the above games. Also, it’s rather easy to grasp the concept and rules. But there are plenty of games that fit this criteria you could use instead.
I would also stress a concept that SU&SD, Quinns in particular, hold when considering if a game is good or not. Does it provide the player interesting decisions? Many old games don’t really provide much in the way of decisions at all. You roll your dice, you move and do whatever it says to do where you end up. Modern board games, on the other hand, tend to give the player some agency. Even in games with a lot of luck, usually players have options to mitigate the randomness if they want to spend the time to do so.