Once you are in your kayak , you will get instructions where to and how to go. Across our beach(where you start) is a island named Fratarski and behind it are two more named Fraskeric and Frasker. You can go around the islands or through the canal between the cost and the islands.
To go around the island and through the canal is roughly 2hrs. If you have rented a kayak for only 1hr. You can go around the first island and trough the canal and back in that time.
You can also stop on the islands pull the kayaks out of the water and go sightseeing for a bit ,cliff jumping or snorkelling. The tour is without a guide so you are free to chose where to go and when to stop to take a rest or just enjoy nice sight. Keep in mind that you are on the waterway where boats go, so you need to be aware of your surrounding.