Instructions
Insert your "Rock Band" game disc into your Nintendo Wii and select the "Rock Band" icon from the Wii main menu to load the game.
Select "Play Now" from the menu.
Choose a song from the list. The songs at the very top of the list are the easiest songs in the game, so choose one of the songs from this area.
Select "Hard" at the difficulty screen. You will now be playing one of the easiest songs in the game on the "Hard" difficulty, which will help you get used to the exact physical motions that are required of you when you play the later songs on "Hard" as well.