It is fabulous she has interest. Encourage the interest but don't expect too much. Pullups were my life saver during potty training, another step towards them being a big kid and giving them the idea how to pull up and down pants.
Don't push her, just encourage her excitement.
With my daughter who like yours showed interest young, I got her a fun potty seat and new stool. I got a sticker chart and we started earning stickers everytime she went on the potty. I just started setting her on the potty every hour and a half, just asking her to try. Sometimes she went, other times not. Rule number one is never ask a child if they have to go, because most of the time they will say no even if they have to! :)
During this process if I put underwear on however for whatever reason she peed them and it was stressful for me and her and lot's of laundry to be done. Your daughter may be different and ready completely now. I kept Pullups on until we were done with the whole potty thing. If I were you I would really play it up, praised her and a sticker was earned. For every 30 stickers she got to pick out a new stuffed care bear. Just let it be her choice right now.
They need to wake up dry most of the time especially naps (night time can take longer), understand the urge, know when to get to the potty and pull up pants and down. Just be patient.
My daughter did have some regression at 3 when her brother came along but we got back on track! Hang in there, it is awesome she is interested!!!! Just let her take her time. For both of my kids close them being 3 we were completely rid of diapers/ pullups in underwear and no accidents! :)