H.S.
He's not ready. My son was almost 4 years old before he was potty trained. I thought he was ready at 27 months, but he regressed (this was my fault due to relocating job to another state)
The signs to look for to see if son is interested in potty training are:
toddler indicates they need a dipaer change
can pull their pants down by themselves
having an interest in "the potty"
What we are doing with my daughter (24 months) is just having a small potty around for her to look at. Sometimes she wants to sit in it and make special effects. Sometimes she'll insist that I take off her diaper so she can sit in the potty. If I or my son needs to go to the bathroom she'll follow us in and sit in her potty. Once again I am taking my cues from her.
There is no right or wrong age to begin potty training, but I think there may be some merrit concerning girls are easier to train than boys.
Just take it one day at a time, but whatever you do, do not make this into a traumatic experience. Potty training should be positive.
Hope this was helpful.
H. :)