Build up your endurance, man.
week 1
5x10
week 2
7x10
week 3
10x10
start out with like 135, ad 5-10 lbs each week, after the first ten weeks, up your reps to 15, but lower the sets again, and build back up. I like to do 10 sets of 20, and then every few weeks, doing a high weight, low rep workout.