Hello Y'all

I am new to bike commuting, like 2 months, thanks to an awesome birthday gift.

I got an unmarked commuting frame with some older/worn tires (700x32). I am looking for new tires. Friends and bike shop employees have been steering me towards two sizes; 32 and 37.

I am slowly making my bike my first choice for commuting within 5 miles for errands and 9 miles for work. I read online that skinny tires are good for speed and wider tires are good for comfort. I ride on bike paths, city streets in downtown Denver and suburban streets.

Is there a difference? What else should I be considering before making a selection?

Thanks!!!