Take him when you go...let him have his own potty and a toy or book he can only have when he's ON the potty.
I'd put him directly in underwear. Pull ups don't allow him to feel wet so if you're going to use them...put him in a diaper...they're cheaper.
Take him every 30 minutes...like clockwork. Whether he goes or not. If he has an accident, immediately put him on the potty. Start again with the every 30 minutes.
As a former day care teacher of the 2's and 3's class, I spent the majority of my time taking kids to the bathroom.
If he's not ready yet, he'll let you know. And in that case wait a couple of months, still taking him to the potty with you...so he'll catch on.
This may be a long drawn out process, but stick to it. Please know that your child will NOT GO TO KINDERGARTEN needing to be potty trained. I PROMISE!!!
Smiles to you. Good luck.