How long would it take to straighten my teeth with Invisalign? Am I a good candidate for it? (Photo)

The area that is most crowded is the bottom at the center. My two upper frontal teeth are moving closer, and one of them is moving on top of the other. Also, the canine at my right is twisted. They have moved drastically in a short period of time, and I am concerned that they will keep moving. I want to know the approximate time I would be using invisalign and if I am a good candidate for it. The only problem is my teeth being crowded, my bite is normal.