AVL Tree Dictionary

Sorry in advance if this seems like a homework dump type of question but I am writing a code that is an AVL Tree and has a file inserted to it that contains a dictionary. The code should ask the user for a word and the program will print out its definition. The problem is I do not even know where to begin with this. I know for the dictionary I should use a BufferedReader and I do not know how to insert it into an AVL Tree. Any help at all will be greatly appreciated.