As I said earlier, this is tough to answer for someone else. But here are some things to think about:
-Does your child seem eager or "ready" to go to preschool? I had one child who never wanted to leave my side. One day she looked at me and said, "I want to go to school." I enrolled her in preschool, and she never looked back. Because the experience was so positive with my daughter, I thought I would enroll my son even a little earlier. This turned out to be a mistake because he wasn't ready for a formal school experience. I ended up withdrawing him and waiting another year for him to show that he was the one who wanted to go.
Can you see your child spending between two and six hours in the preschool you're considering? If you can't imagine it, this may not be a good fit or the right time.
Does your child have opportunities to play with other kids and take part in enriching activities? Preschool provides important socializing, learning, and play experiences for children. Often, a child will reach a stage where she needs more of this kind of engagement than is available at home or in informal settings.
Would enrolling your child in preschool enhance your relationship? As parents, we often don't want to acknowledge that the time that our kids are in school can be easier for us. It can buy us some space to focus on our own work or other responsibilities, or simply to relax. Lessening the pressure that parents of young children experience frequently pays off in your relationship with them.
Hope this helps.