Awkward is always awkward. If you seriously feel that this is something you want to improve, look into yoga, ballet, or some other physical activity. Nobody is too old to improve muscle control and enhance their grace.
More than anything else, you have to look like yourself. You can dress up in outfits that are supposed to make you more professional, or sexier, or more elegant, but ultimately you have to dress like yourself. Yes, of course it is possible for you to be more professional, more sexy, and more elegant, so long as at the core of everything, you continue to have a core SOMETHING that is truly you, as you are now.
So many of the people that I see when I'm hiking around Chicago look as if they bought the entire outfit off of a mannequin, or out of a magazine. These women often look just fine, but there's nothing unique, creative or at all individual in these looks. Somewhere, every day, you have to show your own personal style. Your perspective on the world. Your very quirky tastes and preferences.