Sorry, forgot to mention the details.
We took a tour to Keukenhof gardens and then on to the airport.
We were among the first group to disembark as our tour was scheduled to leave at 7.30am however 2 people did not show and there was a delay while it was confirmed that they had been held on board in isolation (no other details!).
The disembarkation is mentioned above. Just be aware of the bottleneck at the baggage collection area. There were about 4 different transfers to Amsterdam Schiphol airport, all at different times. Some cruisers used our tour to the gardens and then to Schiphol to get to Amsterdam for an overnight stay. They took the train from the airport into the city centre.
There was a line of taxis outside the terminal.
If you wish to prebook a car I have used staxi.nl before and they are good.