Lots of reps bro!!! Here is a sample of a routine I used to do when I could still squat. We used high reps in the begining and low in the end, our own form of periodization.
We did two to five sets each week and stuck with the same amount of reps and weight on that week except on the last week, each week we would knock off 5 reps. Ill give you an example of how we did it and the weights I used over the few weeks.
Week 1- 2 sets of 20(I used 225lbs)
Week 2- 2 sets of 15(I used 250lbs)
Week 3- 3 sets of 10(I used 275lbs)
Week 4- 5 sets of 5 (I used 300, 310, 320, 330, and 315)
Week 5- 2 sets of 20(I used 265lbs)
Week 6- 2 sets of 15(I used 285lbs)
Week 7- 3 sets of 10(I used 305lbs)
Week 8- 5 sets of 5(I used 320, 330, 350, 365, and 340)
Looks weird but it worked very well for me on size and strength. Just in case anyone was looking for some squatting ideas. Be sure to work that lower back adequately enough so you dont fuck it up like I did.