I read your whole story, I thought for sure you were gonna tell us that you killed that kid, thank God it wasn't like that.
Anyhow, you want to know, will your doctor's method of slowly lowering your oxy dose work? Well, it's really up to you. You say:
He prescribed me 20mg oxycodones, 3 in the morning, and 3 at night. which I gave to my dad to make sure I would not abuse them, and he set up a regiment to get me down to one pill a day and then no more.
The fact that your dad holds the pills is excellent. What's not so excellent is that you know how to get as much OC as you like by driving to your dealer(s). If you "cheat" your reduction schedule even once, then the method is probably a failure for you, but it's not your doctor's fault.