I think the key here is mostly to go slow. Right now,if I'm bike commuting I need to keep up with cars or risk getting rear ended or tailgated or shouted at. Setting things up so you don't have to worry about cars while on your bike means you can bike at a more reasonable speed instead of 25mph.
Think beach cruiser bikes not guys in spandex on race bikes
Also infrequent cyclists are often overdressed. You don't need to get out the spandex, but if the weather permits dress so that you are slightly cold while standing still. That gives you the thermal budget to heat up from exercise without instantly sweating.
Think beach cruiser bikes not guys in spandex on race bikes