What do you guys think??!

Ok, so here’s my story with my 2YO toddler: every time we are out, especially in places that requires discipline like story time at the library, kindermusik classes, swimming class, and lately gymnasium... my son always throws tantrums. He doesn’t like to sit or listen to what others are doing, it always seem to me as if he is in his own world (although he likes to play with kids in open play areas) therefore, bottom line is that my son doesn’t like to obey or follow other’s way, he doesn’t seem engaged or attracted to what others do, he always wants thing to go his way,,,

I always notice other kids in such classes who are his age or younger, they seem engaged and attracted, my son is never attracted to anything but himself,,,,,

I’m posting this to see if this is something normal to happen since this is my first child and i’m very worried that he would do the same when he starts preK and later school!

Any thoughts?!