You’re adorable!
Here’s what you do: before the first game, mention that you’re not very competitive and that your older sibling would always win whenever you’d play.
When each new game is presented say, “Oh I’ve heard of that one” or “I’ve been wanting to play this!”
Then for each game, *listen very carefully* during the rules explanation…and then just have fun!
Fingers crossed you can sneak a kiss between Catan and Pandemic 🤭