so I wanna know a simple guide to competeive beyblade burst that my simple 11 year old mind, thx

It's not simple. Go look at existing threads such as the Winning Combos thread.

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Hey, parents! Here are all the answers to any questions about WBO Tournaments you might have! Thread-Guide-Hey-Parents-Answers-to-your-WBO-Tournament-questions

Please consult this guide linked below on how to arrive at tournaments before they start! https://worldbeyblade.org/Thread-How-to-arrive-at-tournaments-and-other-events-on-time