Questions to ask at early start school

Hi ladies, I have a 3 year who will be 4 in July and would like to enroll him into early start. To this day, both him and June baby have been taken care of by their grandparents here in our house since they live with me and my husband. What are some questions I should ask the day care center? I’m very nervous and stressed about where to send him. He also goes back and forth saying he does or does not want to start school but I think it will be good to prepare him before kindergarten next year.