TeenHelp - Moving out- senior in high school

I will be a senior in high school this year. I am planning to graduate at semester as it is right before my birthday and I will be 18. That way, I have enough time to save by January, and enough time to plan. A 1 br apartment is anywhere from 400-500. 2 bedrooms can go up to 600. My job right now pays minimum wage. Once school starts I will be working 4-5 hours 3 nights a week, plus 8 hours Saturday, and 8 Sunday. Min wage is 7.25 by the way. When I graduate I plan on getting a second job, plus extending my hours, to be able to afford everything, as I will probably only have the first couple months of rent. How much should I save for everything? I will not have a car, I plan on getting apartments near my job. So I'll walk. Can someone give me an outline of what I need to do? What I need to think about? And don't tell me that I'm being dumb, or should think this through more. That's why im asking this, so I can figure out how to do this.