Amsterdam is easily walkable and bikeable, but if you prefer public transportation, consider buying a day pass for unlimited use on trams, buses, and metros. The pass costs €8 and can be purchased at most public transportation stations.
If you have more time, consider visiting other popular attractions such as the Heineken Experience or the Red Light District. If you have less time, prioritize the Anne Frank House and Van Gogh Museum, and skip the canal cruise. Be aware that many attractions close early, so plan accordingly. Also, watch out for bicycles and trams when crossing the streets!