Plans and intentions 'going to'
For personal plans we use 'going to' + infinitive.
I'm going to be a football player.
I'm going to be rich and famous.
To make the question form we change the order of the verb 'be' and the suject.
What team are you going to play for?
To make the negative form we put 'not' between 'be' and 'going to'.
I'm not going to study. I'm only going to play football.