M.C.
I didn't start either of my kids on training until they were 3y. Pick a long 3 day weekend and just go for it. Have her wear panties only. Nap time and bed time she can have a pullup, but as soon as she's awake that comes off. My kids would run around the house in just a tshirt and undies. It only take a few accidents for them to get the hang of it.
When you take her into the bathroom, leave the door open. Some kids don't like the door being closed.
When she does mess her pants, calmly take her into the bathroom, wash her down in the shower, if needed. Always change her outfits IN the bathroom. She'll get bored of having to take a shower, and will pay more attention.