Underage drinking ticket?

So I’m a 19 year old freshman at an Illinois college. The other night I was issued an underage drinking ticket & I have to go to court in a few weeks. Any advice on what I should expect? Also, the officer took down my home address as well as my school address, will something be sent to my house stating my offense? & if it is, how long do I have until it’s received? Thanks in advance!!