I would suggest you install a cal pod switch, your new battery will probably last forever and a day if you never really use it. My SOC is almost always full. Congratulations on the car, original insight is the only car I'd rather drive than my current car.
It took me a week or two to fully get the hang of driving a stick. If you can get an experienced driver to ride with you and give you a few pointers once or twice, that would be golden. You'll love it.
AutoStop can be nice. In your car it can be triggered as high as 21mph -- get the car into engine braking and watch for fuel cut by looking to see if the instantaneous mileage bar graph maxes out. Once there, press the brake moderately and pop the car into neutral at the same time and hold the clutch pedal in -- it should drop straight to AutoStop if everything is at operating temp and you aren't running the AC. Keep the clutch pedal depressed and the car will keep the engine off even if you coast in neutral. If you enter AutoStop while on the brake pedal without the clutch pedal pressed, the engine will start up when you lift your foot off the brake. There are other subtleties, but that should at least get you started.