imessage! - Help, i need a walkthrough!

i downloaded free version of imessage ipod touch. don't understand how start up.
first open program, , said have add template.. first: template? know, it's maybe stupid question.. need know.

can give me walkthrough app?

 

imessage isn't app download , install app store, it's built os itself. there should "messages" icon on home screen, click on , can select people contacts list send messages to.

 

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