Brandon Lilly's Cube Method (365Strong), or Jim Wendler's 5/3/1.
Nutrition: Food=Strength 1-1.5g of protein per lb of bodyweight, 0.5-1g of fat per lb of BW, the rest fill up with carbs. Calculate your TDEE online and eat more than what it says. Seat whole foods and lots of it.
Don't cut weight for your first meet. It's a difficult task. All you should focus on are PRs. Nothing else.