How can I be similar to Angelina jolie, as in her Goodwill Ambassador career?

Goodwill ambassadors are not open positions. They are by invitations only, and open only to celebrities and those well connected politcally.

You don't study to become one in college. Rather, you go out in the world to become famous and be someone like Russell Simmons, Roger Federer, and yes, Angelina Jolie.

You need to:

- involve yourself in high profile philantrophic organizations such as volunteering
- get to know your politicians, and network with people who matters

Otherwise, get a career in the development arena (be an economist, work in the UN)