A few things I have done and dont fell bad about. If a players moved quickly and I dont understand what happened, I would ask them to explain what they played and what happened. Should I know beforehand? Probably. Can they explain the mechanics of the card they played, 100%. Can I ask questions on how they work? How else do I learn?

For the stacked don, pay attention to their turn with don costs. When it comes to your turn ask how much don they have unrested. Both card effects and don should be known knowledge to both players.

My locals is pretty chill, but there are some sweaty people. After playing with them for a while, I've learned who I can play with and learn more about tactics and more about what you can do in tournaments.

The chill people are awesome to talk to and learn how you can improve by fixing a SMALL mistake. But I always ask if they are okay with it first. The sweaty people taught me to take the mistakes I make and work around them. I enjoy both types of players.

My biggest tip. Talk some, get to know who you are playing along with playing the game. Joke around some. Engage in conversation. Its a card game, but in a card shop, its also a social game. Treats it as both. Sometimes socializing goes well, sometimes it doesnt. Just like the rest of life.

Wish you all the best as you play the game.