Whatever method you choose do to, do one that is INTENSIVE. Meaning, you throw away all diapers and stick to training until she's learned it (for BOTH DAY AND NIGHT). This might sound daunting, but its possible in a few days - REALLY!
Things to avoid when researching potty training methods (we tried one that was horrible and tried just sitting her on the potty until she went and both failed, so I did some research before choosing a different method).
1. Prolonged sitting on the potty
2. Punishment for having an accident
3. going back and forth between wearing diapers/pullups and underwear.
4. Sitting on the potty at timed intervals.
Remember to keep positive, she will have TONS of accidents, its great opportunity to LEARN, have lots of rewards for ANY sign of progress!
The method we used, and I HIGHLY recommend, was www.3daypottytraining.com And they recommend 22 months as being the PERFECT age to potty train.
The ebook costs $25 and then you also have access to her online help site (which we never needed, but if you did have an issue its great support) where you can get answers to your specific issues.
Best wishes!