Tina, If you want to really experience the Amalfi coast (we love this region) you are going to need to use the roads, whether it be by private car, tour bus, or the public SITA buses. The ferries/jet boats are very limiting since there are only a few boats a day that can get you to Positano or Amalfi and they do not always fit a one-day schedule. Besides, part of the fun of the Amalfi Drive is driving on the Amalfi Drive, not looking up at the road from the sea. If you are not comfortable renting cars and going on your own than my suggestion is to find a decent private driver (I cannot help with this since we always rent cars). The public SITA bus that runs between Sorrento and Amalfi is another option, but it can be awfully crowded (standing room only) and begs for tourists with a real spirit of adventure. With regard to Ravello, you can only get there from Amalfi and you can use either a local bus, taxi, or your private driver (assuming you have a driver). You will also want to allot sufficient time to really walk through Positano (at least 2 hours).