TIPS PLEASE - summer with a baby

This is my first summer with my baby who will be 1 in June.

Can you please share any tips and tricks for summers with a baby? Here are some specific questions I’ve wondered

Driving with the windows down? Can I crack the window by my baby in the car?

He doesn’t have much hair yet and worried about sunburns on his head. Do they wear hats when outside?

How do you dress them at night? Assuming around 69 degrees inside.

Bugs! I hate them but gosh are they everywhere. Especially because we live in an old home. How do you prevent bites to your baby?

What’s a good cool treat for a baby? Seeing as he can’t have ice cream

TYIA