Potty training question!

Anna
My son just turned 1 1/2 years old and he keeps taking his diaper off! If he has a way to his diaper he will take it off. 
Would you say this could be a sign of being some what ready to try potty training? I'm a first time mom and have no clue when to start or the signs. 
Also stupid question: how do you potty train a boy? Do they just sit on the toilet as well? Do you have to train them to push their penis down so pee doesn't get everywhere? Sigh I'm lost lol 
TIA!