All kids are different. My son is 17 months now and I know for sure that he isn't ready. But if your son understands everything you say, then I would start of by simply allowing him to follow you (and hubby) into the bathroom and basically show him what's going on. That's how I started with my other kids and if worked well just to show them what the toilet is meant for. After that, every time you change his diaper, make a big deal of it. Eww, etc (but not in a way to shame him, you just want him to know that he can be a big boy if he does it in the toilet).
Can he say potty? Or pee pee? If not it's to early. But of he can, you should buy him an attractive potty and sit it in the bathroom. ask him if he has to go often. Like every 20 to 30 minutes. Make sure if he sits down on the potty he does not get up until he either goes number one or two. That way you are establishing that it's not just a seat, but a potty.
Keep in mind that he has to know what pee a poo means first.
I think the best way to introduce it is with a whole bunch of cute videos and story books. The library usually has tons. Just spend a few weeks watching them and reading them together for fun, without trying to make him try it yet. It will start to sink in, and if he's ready, he'll start wanting to try it himself and it will be his idea instead of yours. Then just follow his lead, be patient with mistakes and reward any progress.
We just praised our daughter for going, asking, or even trying. I wasn't going to do treats and try to break her of it. And I had heard the sticker chart didn't really work. We did a week of diapers at nap and bedtime. Then one night she told me that she didn't want to wear a diaper anymore. I told her that she couldn't potty in her bed, if she did she would have to wear a diaper. She has never wet the bed. She did have a few accidents here and there for about 3 months, maybe 2 or 3 times a week. She hasn't had an accident in over 4 months now. We travel a lot too, and she has never had an accident in the car either.
also I personally found that doing the sticker reward was actually worse. because she would go in there and just randomly want a sticker and I kept trying to tell her she had to go potty to get a sticker. it just never really work that well. also getting him snacks or treats if they go potty. one of my friends with potty training her daughter and I'm not sure what she would do but she would pretend to be peeing and then flush to get a treat.
I have a girl. So i never potty trained a boy. Some boys i grew up with. His mom with stick them on the back porch and let them pee off it. Being boys, they loved it! This was also over 20 years ago.
With my daugther we mostly spend time in the living room. I would let her rum around naked. Every 20-30 minutes ask her to sit down, she would have a few accidents for a few days. But she caught on very fast. After a week she was using it on her own.