How To Choose Sports For Detailed Study

I am trying to decide which sports I should focus on for deeper study, but the variety of options makes it difficult to choose. Football, basketball, tennis, and even esports all seem interesting in different ways. I feel that focusing on too many at once might slow down my learning. That is why I would really appreciate advice from experienced people. How did you choose which sport to study more deeply? What factors helped you make that decision? Your guidance could help me focus my efforts more effectively.