We rode on a ship. I strongly advise against it. There's nothing to do there. It's better to walk along the embankment by ourselves.
We bought a ticket for 10 manats to the upper deck. They promised tea and facilities there. In fact, you need to get the tea yourself somewhere (we didn't go looking for it), went out about 800 meters from the shore and came back. Nothing interesting.
We went on a boat trip, the views of the city are excellent. However, there is no clear timetable. We sat on the deck for an hour until the ship was completely filled with visitors, then we rode for 30 minutes. 5 manat shared ticket, 10 manat VIP- separate upper deck.