Ok, be patient and don't push too hard. If you make it a bad experience for her, it will only slow everything down.
If shes willing to sit on the potty praise her for that. Don't fuss and yell because she didn't actually use it.
I potty trained 3 kids, and this may sound nuts, but i put their potty chair in the family room beside the toybox.Kids don't want to be off somewhere by themselves..and if its too far away from where they play, they may not make it to the chair.
If you have it somewhere close by, with lots of books near..she can sit there and look at books (Potty training books for kids are great to have right there for her to look at) she will spend more time on the seat and have a better chance of using it.
Also, have a routine..have her sit on the potty every hour..starting when she wakes up..if she wants to get up, just ask her if she's sure..if she is, then let her..no big.
When she does use it, praise her..call grandma and have her praise her. Keep a chart on the wall and buy some stickers. Every time she is successful, let her put a sticker on it. When she gets so many (like every 5 or 10) give her a reward: a special snack, or extra play time, etc.
Never fuss or whip your child over potty training. It will make her want to stay away from the potty all together.
I know you want her trained sooner rather than later, but be patient. All kids learn at their own pace, but all kids do learn...