How to train a fish?

Apparently, my cousin gifted me a really weird gift yet my favourite. Who in the world gives alive fish as birthday gift? He gave me this heavy white squared box and was like "Hold it carefully cuz this would be the best thing in the world". And indeed it was, an aesthetic looking Red dragon betta Fish!!! My god its fins are so aesthetic. He said everything needed and how to keep him healthy and stuff. However I want to train him. How to train a red dragon betta fish? And any name suggestions for him (it's a male)?

How to train a fish?
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