They don't need to do it with a ceremony and make sure it is kosher?
If you're serious about becoming Jewish you'd better practice using the lingo right.
Kosher applies only to food; the dietary laws are called the
Kashruth. Once you've been Jewish for a couple of years and made them feel proud of taking the chance of accepting you into the community, then you can start making little jokes with Hebrew and Yiddish words. But not now.
All right, since no one else has asked: What is your reason for wanting to become Jewish? They're certainly going to ask that question. Most people do it because they're planning to marry a Jew.
Judaism isn't just a religion, it's an ethnicity. The Jews believe that they have a Covenant with God, which makes them his Chosen People. But wait, before you start celebrating. That Covenant thing has not been working out well for them at all. Apparently they just have not been able to keep it, and it makes God very angry. Jews don't believe in the God of the New Testament, the guy who took an anger management class and then sent down the First Hippie to teach everyone about Love and Peace. Their God still turns people into pillars of salt and would flood the entire planet again if he thought it would do any good.
Anyway, every bad thing that has ever happened to the Jews--from the exile in Egypt and the destruction of the Temple (more than once) to the Diaspora, the Holocaust and Great Britain's little practical joke of telling them they could have Palestine back but not telling them that some pesky Muslims thought it was their own homeland--are God's little reminders that the Jews have not held up their end of the bargain.
So when you agree to become a member of the Jewish community, you'll be telling GOD HIMSELF that from now on you want him to regard you as a Jew, and give you--AND YOUR CHILDREN and their children for all eternity--your fair share of the plagues, famines, wars and persecutions that he's got in store for his Chosen People in the future. This is one of the reasons the Jews don't take conversion lightly. It would not be fair to sign a Gentile up for that grief unless he was really sincere.
Are you sure you're up for this?