I'm currently going through the transition. One I've learned one fact - People, People, People. It's all about people skills. People with emotions, people with attitude, people with ego and some great people as well. And you'd learn, you have to rely on things that aren't in your control. Age doesn't matter. What matters is how mature you are. Depends on whether you can smile and move ahead even when you know its not what you think is right.