Wooow you have had quit good dreams and It's sad you couldn't achieve 2 of them because of one reason or the other. Your dream of either becoming a dancer or a doctor didn't come true simply because Maybe you here not destined towards that path.

so now I have chosen this field And I am working every day so that I can play in National and it is my dream that one day I can get a medal for my country too.

I haven't understood anything about this statement. What competition are you talking about and which medals are talking about because you talk of weightlifting and now you suddenly talked of playing in competitions and winning medals without telling us the competition