Congrats. The first three days are a shock, the next three weeks are tough, the next three months easier and then you’re home and dry.
As a Dad myself and remembering our own event 16 years ago I will give you one word of advice:
ROUTINE.
Kids thrive on routine and knowing the limits and boundaries. A story then bed at the same time every night, kiss and cuddle, lights out, end of. Don’t go gallavanting around the country showing him off, that can come later.
If you read to him every evening he will get a head start on all the other kids that you’ll never regret. Ours amazed the nursery school staff by reading out car numberplates when they went for a toddle to the park.
He’s now turning into a useful cyclist and willing to spend more and more time on the front.