First walk! Tips for a good experience?

My puppy is three months old and today he will finally get his last vaccine, so we are just about to start walking.

He has left the house in my arms, we have sat next to the nearby street to listen to cars, motorcycles and see different people and animals, but this will be his first time walking outside.

What things can I do to give him a good and fun first experience? How long should the walk last? When do you know it's time to start reinforcing your current commands outside? I guess the first few times he will be super unruly and distracted, so there is no rush.

I appreciate any advice and I hope that no question is stupid, this is my first time with an energetic dog, since my old elderly girl only liked to go out, do her business, smell things and sunbathe lying on the grass, so I don't know much about playing outside or what things serve to drain the little ball of energy that is this puppy.