How did you know your girl was ready?

I’m using the Oh Crap! Potty training book so I’ve read it and that’s the method I’m following.

My daughter is 2 years 3 months. We tried when she was almost 2 and it was clear she wasn’t ready. I took out the potty this am, have a reward system and she was excited. Then, she took her potty, put it back in the bathroom along with her “potty stickers” and said “no”. I don’t want to force it, but she’s tugging at her diaper when it’s wet, she tells me when she’s going and she likes to be independent.