what age would you send your child to nursery?

so my son is 2 (3 in november.) he has suspected autism (on the pathway) and doesn’t speak, he can show adults what he wants and has decent non verbal communication. i am wondering if i should send him for the january 2026 term (just after his 3rd birthday) or september 2026. it will be a primary school nursery (if that means anything)

what would you do?