How can I win the starting qb job at U of M?

I made the U of M team as a walk on qb. I mostly played running back in 10th and 11th grade however i was the starting qb for my high school in12th grade. Right now I am a redshirt and I am the 5th option for qb at u of m. I want to play next season and eventually start the following year. I am physically gifted... show more I made the U of M team as a walk on qb. I mostly played running back in 10th and 11th grade however i was the starting qb for my high school in12th grade. Right now I am a redshirt and I am the 5th option for qb at u of m. I want to play next season and eventually start the following year. I am physically gifted I can run a 4.43 40-yard dash, bench 340, and squat 470, throw for 65 yards, however I just have average accuracy. How long should I practice throwing the football in the offseason to have good accuracy in 1 year or 2 year time?
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