Personally I think that is a great goal. Its high enough that you will really have to work to attain it, BUT it's not so high as to be unattainable.
How about setting some intermediate goals, something to look forward to each night. Example, always hitting the head pin on the first ball, or not missing a single pin spare. Really just pick something that is holding your game back and improve on it each week.
Make sure to keep us updated on your progress. It's always refreshing to hear from the beginners, makes be remember why I love this game.
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~~~SrK - Have balls, will travel
Spending the kids inheritance one tournament at a time.