X, I wouldn't say wanting to show off your creative side is immature. It is normal. Heck, I do it too.

However, awkwardness requires some thought to overcome. Take some time to observe the nuances between people as they meet, as they communicate. Not just what they say but how they say it. In particular note body language. Even watching TV.

These nuances can even be felt in written form such as internet forums simply by the manner in which people write. When you find yourself coming across a post where you like how the person 'sounds' take a look at how they wrote their message. Same for if you find one that irritates you are gives you grief.

You ARE worth it.