All of my children were in day-care while I worked FT, and they did fine there. My oldest also went to pre-school, which was then nursery school. The reality is that at 3, she was the youngest one there, and it showed. I don't think it made her more or less successful in life. It was just a different form of entertainment. (she's now 27, and very successful in her career, but she's the only one of 3 who went to nursery school, and the others are not any less successful.)
At age 2, and even at age 3, they do "side by side" play, rather than to truly play "with" others. So whether you put her in presschool or not depends upon what your goals are for doing so.
If you think it will ready her for kindergarten, I would wait until she's ready to be "readied" -- like ages 3 or 4. If it's to give you some time off, then go for it. If it's just to broaden her experience and give her time away from mommy, and/or siblings, that's fine, too. But know what you hope to accomplish and that this is the best way to do so.
Frankly, I would be more inclined to enroll my child in learning to swim at an early age, because while she may not learn to actually "swim" at that age, she will learn not to panic should she fall in, and to be able to keep herself afloat until help comes. And preparing my child to cope with a potential emergency is more important to me than putting him or her in an educational program at an early age.
(Can you tell I used to teach swimming ?? also, while at a swimming pool, my then 10 year-old who learned to swim at age 2 actually saved a child's life, by realizing a kid was in distress and doing exactly what needed to be done before I had time to get out of my lounge chair. :-) I am all in for learning skills that will help us to feel accomplished and capable, while having age appropriate fun, and then being able to use those skills later in life to positively impact somebody else's life. :-)