I trained my son around 24 months. He was interested and able, but he didn't care one little bit if he pooped or peed in his pants and that is a HUGE need in order to potty train fairly easily. I did get him potty trained, but it felt more like I was the one potty trained. I was always keeping an eye out for him, reminding him, and he couldn't pull his pants up/down, so I always had to help him. If I was taking care of my newborn baby and he needed to pee/poop, sometimes I simply could not stop what I was doing, and he would have an accident. After four months I realized I was the one who was really potty trained, not him! And, I also realized it was a lot more work than it needed to be, so, I quit.
At around age 3 I tried again. He never seemed to care when he pooped/peed. I noticed one day that if he was bare bummed, he was very conscious of his pottying. So, off came the underwear and he just ran around barebummed. I had him sit on towels and stuff like that. He only had one poopy accident, as he was running to the bathroom, and he never did it again. He was potty trained SO FAST once he went bare bummed. It was really just a matter of 2-3 days. He also was able to pull his pants up and down, which is a requirement for me now when I potty train my kids. The ease in potty training was amazing compared to when he was 2. Now I feel like it's a waste of my time and effort to try to potty train them when they are that young. If you have no other children (or a big spacing), it's much easier. But if you have your hands full, it's not worth the effort, in my opinion, since waiting makes it tremendously easier!
He was my 2nd baby. My first and my third were both interested around the age of two. But I have discovered that that is all it is. Simple interest. They don't really seem to want to potty train because they start resisting, want their diaper back, get upset, etc. So, when they get interested around age 2, I let them use the potty as much as they want. I'll even put them in underwear to see if they want to train, but once they start having accidents, they want their diaper back. So, we stop.
With #3, she just turned 3 a week or two ago. A few days before she turned 3, I told her "You are almost 3! That means you can go poopy and pee in the toilet like your brother and sister! That's so exciting!" I made it sound SUPER exciting. She had no negative association with the potty, and she was super excited too. When she turned three, off came the diapers, and on came the underwear. She felt like such a big girl. She went 3-4 days with no accidents. Then she pooped and peed in her underwear and didn't tell me. So, we went bare bummed. I told her that if she accidentally poops and pees, then she can't wear her underwear. We don't want to get them yucky. It wasn't said as punishment. It was said more matter of factly like "that is not what underwear are for, so we'll need to keep them off until you are able to go in the potty everytime". So, she went bare bummed the rest of the day. She did get her underwear back the next day and it's been several days and no accidents. She easily poops in the toilet. It's been a BREEZE. It is SO EASY when they are a little older. I'm not the one potty trained (like is the case with many really young potty trainers - it's the parent who is really potty trained...hehe), she is the one potty trained. It takes nothing from me other than praise and encouragement, and wiping when she goes #2. For me that's important because I am 31 weeks pregnant and have a 13 month old to chase after.
Anyway, that's probably more info than you wanted. But hopefully something in there will help. If you want to go ahead and try, I say try the bare bummed method:-) It was the ONLY thing that got my son to care when he pooped/peed. And if your child can't pull his pants up or down, I would seriously reconsider training right now. Once you have another baby to take care of, it can get quite challenging to get to him before he makes an accident waiting for you. (my girls could pull their pants up and down at that age, but not my son!)
Good luck!