Trying to figure out preschool options in Conroe

We are in 77386, Rayford area and I’m trying to find a free preschool for my child. We don’t qualify for free public preschool in Conroe ISD but I can’t afford $1200 month daycares. What are some alternatives? I’m hoping there’s a free charter school that accepts 3 year olds. He’ll be 4 in January.