L.F.
Check out "Once Upon A Potty for Her" on DVD. It has a silly potty song and cute kids showing how to sit on the potty but most important is after the show...a DR. shares info. for the parent about potty training and readiness. I have 3 girls and 1 boy and we've watched this dvd over and over.
Sounds like your daughter is showing some interest but I still wouldn't push...if you start to make it a battle of wills and get frustrated with all the "accidents" then it will just take even longer to potty train. Some Moms just have the "get 'er done" mentality but I wanted it to be a more relaxed, successful, positive experience so I didn't start until about 2-1/2 yrs. old and that worked for our family. Children are smart and they'll let you know when they're ready (some kids sooner and some later than others).
I agree with starting pull-ups at naptime and bedtime and 100% cotton underwear for during the day. We also used stickers and lots of cheering and hugs as positive reinforcement when the girls went potty in the stool. Don't be surprised if potty comes easier than having a BM in the stool too because doing #2 in the potty can be scary for some kids. Good Luck!