We all have issues, feel self concious, or even over confident. Everything we do, we do for reasons, mostly not out of enjoyment of our OWN true self.
Play, sing, laugh, enjoy more and celebrate more... This is gratitude of living. Of being alive. It also helps make you feel better too.
Integration of this throughout an entire day will only become exhausting if you try too hard. If you listen to your 'inner' self, your intution, you will do as you feel.... which, will say 'slow down', calm down - not for any particular reason, other THAN.