Wait longer. Can he pull his pants up and down and flush the toilet? If not, then wait until he can.
I potty trained my oldest when she was three. She did it quickly and it wasn't stressful. She was interested around the age of two, but it was more a curiosity, fun type of thing for her. I don't think she was REALLY interested in potty training. I let her go when she wanted and we made it really exciting. She thought it was fun. Then she lost interest. A year or so later, I decided she needed to be potty trained. She was a little over 3 years old. It was fast and easy. Her comprehension was better, and she got it down fast. So, I don't regret waiting.
Then with my son, I decided I'd try around the time he turned two whenever he showed any interested. He potty trained, but it wasn't fun for him (even though I was nice) and it was clearly too stressful at times. He didn't know how to pull his pants up or down. He had to rely on me WAY TOO much, not just for pulling his pants up and down, but I had to watch him closely every day to remind him to go potty. I felt more like I was potty trained for him. And I had a newborn I was taking care of too. So, after four months, and after thinking how silly I was for wanting to potty train him when he wasn't independent enough, we stopped. When he turned three, I potty trained him. By then he was able to pull his pants up and down on his own and flush the toilet. He needs help wiping after #2, but that's no problem. (my girls could pull their pants up and down at 2 yrs, but he didnt' master that skill until later).
So, with child #3, she just barely turned three. Through out her 2nd year, if she wanted to go potty, I would take her. We made it fun and exciting, but she led it completely. I never tried to force her to potty train. I learned from my other two that I feel like it's kind of pointless and not worth the work when you can just wait a little longer and it's WAY easier for them and for you. She just barely turned three (a few days ago) and so soon we'll be getting her into potty training mode. I told her that now she's three, she's so big that she's going to get to start wearing underwear and going potty in the toilet all the time! I made it sound super exciting. She's excited. I just need to get my baby napping better and not taking up so much of my time so I can be available enough for my 3 yr old! Hopefully that will be soon.
So, my advice, here's what you look for in order of importance (my importance):
- Can your son pull his pants up and down on his own (he doesn't need to be able to button them)?
If the answer to that one is a no, then stop there and don't potty train.
But if the answer is yes...
- Can he flush the toilet?
- Is he consistently interested?
- Can he communicate with you?
If those are "no", then I'd wait. Quite possibly he's going through a phase of showing interest, but it's mostly just for fun. All of my kids did that. I think most people potty train at that stage, but I find that often it ends up too stressful for the child (and parent) and in the end, I feel like it's best to wait.
I'm definitely not anti-early training. I think it's great if it works, but if you don't feel like it's time (even just for you), then wait. There is NOTHING wrong with potty training later. It will only get easier and be accomplished faster. Though, odds are if you don't do it now, you won't be able to do it until he turns three. There is an age (between 2 and 3) where they are very resistant. So, likely it'll be now or else wait until he's three.
When you do potty train, I highly recommend the bare bummed method. For some reason, they are naturally more aware of their bowels and urinating when they have no pants or underwear on at all. They will still have mistakes because they need to learn what to do when they have to pee/poop, but it only takes a few mistakes and they are trained. I have mine sit on towels when they are bare bummed for cleanliness purposes!
It was SO MUCH easier to train mine when they were older.
I've written a novel. I hope that helps some!