@sinoo.fit First, make sure not to mix up happiness with pleasure. Happiness is self-sufficient, the end and perfect state. Happiness does not need amusement. Whereas, pleasure is fulfillment, a pleasant feeling you get when you do or completed an activity (ies). The proper pleasure makes the activity more desirable and pleasant. Every activity has its own proper pleasure. Every senses has its own pleasure too (sight, sound, smell, etc).
Imo, key to happiness is by involving oneself in virtuous activity and don't overthink things (overthink & critical thinking is different). Oh, and don't crave for happiness, let it find you and you will be fine.