I.C.
Yes, absolutely he is ready! If he is showing interest and is willing to sit on the potty and even comfortable enough to "go" in it, then definitely run with it and start potty training now while he is interested. I could have started potty training my son around 17-18 months because he was showing interest. I waited until he was 23 months and within 2 months he was potty trained. Don't believe the myth that boys are harder to potty train and you have to wait - it's NOT true! Good luck!