Here's what you can do to become a better Duelist:
* Play through the Story Mode: This will teach you the basics of the game and introduce you to various strategies and deck types.
* Unlock New Cards: Collect cards by completing challenges, winning duels, and using card packs. A stronger deck will help you win more duels.
* Practice Against AI Opponents: Select different difficulty levels to challenge yourself and hone your skills.
* Learn the Game Mechanics: Familiarize yourself with the game's rules, card effects, and different phases of a duel.
* Watch Tournament Play: Observe experienced players to learn about advanced strategies and deck building techniques.
Remember, becoming a skilled Duelist in Yu-Gi-Oh! World Championship 2007 takes time and practice. Enjoy the journey and keep building your deck!