Keep trying different things; whatever sings to your heart and not what other people tell you you should do.
Don’t approach it from the point of view that you want to create something big. That can put a lot of pressure on you.

See this as a time of exploration. Eventually, you’ll come across something that you just can’t get enough of and then the really exciting journey will begin.

You have plenty of time so don’t rush, you’re still young.

First of all, congratulations on your weight loss 🙂

I’m quite surprised to hear that you feel you have to ‘mend’ certain aspects of yourself. You are who you are – you don’t need ‘fixing’
If being loud is naturally a part of who you are, so what? And are you really being ‘annoying’ or are you just being you, having fun?

Obviously there is a time and place for everything but don’t try to hide away parts of your personality if it’s truly who you are, especially the passionate side!
Emotional Freedom Technique has been said to be effective and I find it often calms down my mind when it’s racing. You can find many videos on Youtube that will show you how to do it.