You know the other great thing about a "try out practice journal" ? It totally eliminates the intimidating "where do I start" horror of a blank white page.....with out really knowing it, with freedom and abandon you have already started your page. Let it guide you and take you where it will...relax, enjoy the ride. Make it as fun or as serious as you want, it's your journal....express yourself.
Make yourself a brew, play with your mixed media, let your imagination fly loose and make some art.