D.D.
Sounds like she is right on schedule for her age. Most kids dont fully "get it' until right around age 3. My suggestion is to get a potty training video (maybe from the library) and have her watch it. i drug the potty chair in front of the tv so she could interact.
It takes patience. My daughter was very similar to your description, and we made a road chart with squares,(about 20) and made a jar of skittles/m&ms, so she got a potty candy every time she went and a sticker. When she got to the end of the road on the chart, she got to go to the dollar store and pick out a toy.
That worked most of the time, but still I learned to back off and not be too persistent. The more I hovered, the more she seemed to fall off the wagon.
My advice: Let her go at her own speed, with gentle reminders. Get the video. Make a chart. Nothing but positive comments, and lots of those, even on little successes.
Good luck!
ps - we started with a small potty char, then she ditched that for the toilet ring chair,with a step stool in front of the toilet for her feet. She was scared of falling in and, her words, "going round and around."