If she is showing any interest at all I would DO IT!!

I think she is definitely old enough to do it 100%, so when you start get rid of ALL nappies (except maybe for night time) - you make a big deal about being a big girl now, and not needing nappies during the day and that she gets to wear big girl pants. I believe that if you swap and change between nappies and pants it becomes confusing.

Start when you have your most days at home in a row - and stay home as much as you can in those few days. At first just take her to the toilet every half hour - make a big deal "TOILET TIME!!!" and if she does something on the toilet make a huge deal out of it. Reward/sticker charts are great for this. Within a few days, if you stick with it you should be able to start waiting longer between toilet trips.

I used thepottytrainer method (google) so check that out if youre interested. It worked superbly for both my girls, and they were trained at two. It is really hard work to begin with, but if you can put the hard yards in upfront I think it makes ALL the difference!

All the best