I used "Potty Training in a Day" with my first and bribery with my second. Both techniques worked perfectly and in one day! The reason for the different techniques was due to the child. My first one had just turned 2 and needed a bit more description as to what was going on so "Potty Training in a Day" was a perfect solution. My second one was the same situation as you are in, I had a baby that was nursing and felt way to exhausted to even take a day to potty train. So although he showed all the signs that he was ready, I wasn't. (BTW - I do think you daughter is ready.) Needless to say, I waited 4 months before I finally broke down and trained him. During that 4 month period, he would occasionally go potty on the toilet himself, I never directed him or even showed him but it was not consistent. Once I chose a day to do it, he was easy because he already knew how to do it he just needed motivation, hence the bribery.
Long story short, go ahead and wait if you want, I don't think it made a difference with us at all. That being said, after he trained so easy with the bribery, I wish I had done it earlier just so I wouldn't have had to change diapers on two kids. It sure was nice to just change one baby.
Good luck!