You start the same as a girl... Either let him run around at home with no bottoms or you put him in undies ( have at least 20 pairs cause he will make messes... Watch closely there will be signs he needs to go. When see them ... Say "do you need to potty" them run him in there before you know it he will figure it out. The trial with boys is you have to teach them to make sure it's pointed down
My son was easy. Two weeks after he turned two he refused a diaper, and has been potty trained ever since. What I did with both my kids was introduce the potty early. When they started walking I would put them on the potty when they woke up in the morning and after naps. I didn't push it or do any reward system other than clapping and telling them good job. My daughter was fully potty trained before she turned 2. I recommend real underwear. Don't bother with pull-ups. Good luck!
my son turned 2 this month and he has been going on the potty for about 1 month now one day he just wanted to go on the potty! now it's been a lil hard but we normaly let him run around naked turning the day and that seems to help he's slowly getting it :)