Jet Boat from Naples to Sorrento

Yes, do it! Especially in high-season, it is far better than the Circumvesuviana. Take a cab from the train station to the molo (pier). You might want to reserve online if it is a busy day/holiday.

Sure. Take any of them that suit your timing. You can find schedules for boat service around the region here:

https://www.capribooking.com/en/ferry-schedule?path_id=21

Thanks Laurel and Kathy