Comfortable is such a personal question. I am afraid I have no better answer than to start throwing money at what is not working for you until you find what works.

Bars were at one time pretty standard at 7/8 inch, same as most motorcycles made outside of the USA used to wear, but that is no longer true - same as for Motorcycles. All kinds of variations, but I would guess that bike to have 7/8 bars, but you really need to measure, or have a local bike shop (LBS) make a reccomendation.

A 22 mile commute is probably longer than most people would make with that bike, but if it works for you, then it works. That bike would more typically be used for short errands and cruising - lots of social stop and talks. If you ever do switch to a more purposeful commuter after riding that Panama Jack 22 miles a day for a while, you will end up very strong and will surprise yourself how fast you are on something like a road bike or a purpose built commuter.

Welcome to the forum, and enjoy the heck out of that bike, eh?