Two people can be in the same place, one enjoys themselves and the other doesn’t.
Enjoying yourself is something you choose to do, it’s like a psychological action.
You see the sky and decide to enjoy its beauty
Enjoying yourself is important because it makes life worthwhile.
People who don’t enjoy themselves have a hard time working, because there’s no point, it’s just tired and boring with no reason to do it.
People who don’t enjoy themselves find that other people don’t want to be around them, there’s no fun and enjoyment.
If you enjoy yourself then you’re fun to be around. You enjoy yourself for the sake of others so they get to experience it with and from you.
You can be doing the most boring job possible, but there’s always something to enjoy, always something around that’s enjoyable. Whether you’re in a job stacking cans in a supermarket and you just enjoy whatever’s lovely in the supermarket.