The application process is like trying to get into a super-exclusive club, except instead of a bouncer, you've got a background check and a polygraph test to get through. You'll also need to submit an application, which will ask you all sorts of deep, dark secrets about your past - just kidding, it's mostly just your education and work history. But don't worry, it's not as painful as it sounds.
Once you've made it past the application process, you'll be invited to take a written exam, which will test your knowledge of everything from laws and procedures to basic math skills. Don't worry if you're not a total genius - the questions are designed to be challenging, but not impossible. And if you're really struggling, you can always study up beforehand.