Need advice please

Jessica
So my son is almost 3 and we are working on potty training and it's pretty hit or miss. Sometimes he wants to and says that he does but other times he doesn't want anything to do with it. But it seems that ever since we started potty training he's been I guess acting out. Like he's climbing on the counters and getting in the fridge ( literally in there) he even ripped trim off the wall by pulling as hard as he could on a chain locked door. So I guess what I'm wondering is if this could be from potty training and if it is does it mean that he maybe isn't ready? We have another one on the way and I don't want 2 kids in diapers but if he really isn't ready I don't want to pressure him.