The striving can bring happiness. Some of it depends on what you are striving for, but having meaningful work can make you very happy. For instance,....
Happiness is packing Operation Christmas Child gift boxes into shipping cartons to be sent out around the world.
Happiness is learning techniques that will help you earn your orange belt.
Happiness is learning something useful from a youtube maker.
Happiness is finally figuring out the trigger system on one of your inventions.