L.,
My greatest advice on potty training, especially boys is DON'T. All of my children have potty trained themselves for the most part. I encourage the potty but I don't pressure. The signs for potty training can show up LONG before he's really ready in his mind to use the potty. And there may be many still missing. My just turned 3 yod knows how to use the potty. He does it every morning when I take his diaper off and he goes. But he isn't potty trained. I am!!! He knows how to make it come out but he still doesn't recognize the signs that he's about to go. The fact that your son does could mean he'll potty train earlier (like my girls did.) But you may still have a ways to go. He obviously doesn't want to sit on the potty. If you start to force him he will resist it and it could take longer.
All of my other children decided on their own when they wanted to potty and it didn't take any time at all. My oldest was 2 1/2 yod, my oldest ds one month shy of 3 yod, and my youngest daughter was exactly 2 (she was the easiest.) With my 3 yod, I encourage him to use the potty and we talk about where the pee and pooh go. He can tell me but his little MIND isn't ready to put it there. He gets too busy in his day to remember the potty.
Your little guy is so young. If you force the issue it could take longer than you want. But if you relax and just allow his body and mind to mature without pushing the issue, you will avoid much stress. If he shows interest then encourage that. But don't force him on the potty. Leave it out for him to see and use and let him lead this. Boys are harder to potty train than girls.
Just a few pointers though:
1) if you have a backyard, let him run around without a diaper and just a t-shirt. That way he will get to "see" where the pee comes from.
2) Pooh is harder to train in most children. You will need the most patiences in this area.
3) Consider a switch to cloth diapers (even if temporary.) The diapers now definitely don't help them feel wet. But beware. If he doesn't care it can backfire (as in the case of my 3 yod who will sit in just about anything all day. YUCK!!! He avoids me like the plague when he's dirty. LOL!!!)
4) AVOID PULL UPS. Those things are no different than diapers and they are waste of money. Invest in some of those thick gerber training pants (I can only find them online now) and use those when he's ready.
These are things I have learned through potty training my children. I just don't make alot of effort. I reward with jelly beans when my ds does potty (and a lollipop if he poos. We use natural candy that I found online.) He knows how to do it. He just hasn't made the connection yet.
BTW. I thought my 3 yod was ready to potty train about 8 months ago. I did try. I have a baby in diapers so I was desperate to save money. It was a mistake. LOL!!! Anyway, he continues to add specific signs that I never witnessed in my other children. His latest thing is that he can't stand to have dirty hands. Hope springs eternal in our household. I hate changing preschool diapers. But I love my son and I will serve him as he needs me. :)
God Bless,
K.