I am going to prison for 6 years please help!!?

i am to turn my self in this tuesday. i live in georgia and i have been convicted of trafficing a large amount of marijuana. 12 lbs. yea i know... I had a good attorney present with me in court and he got me the 6 year deal. i was looking at ten. anyway what is important is i am onlky 19 years old. i am too young to be going to prison and 6 years is waay too long. i have absolutely no chance of early release or parole. jail was awful and i was only in for 3 days!! i can only imagine how horrible prison is going to be. i really need sum advice like what is the intake process like? how terrible is the food? how much privacy will i have? will i have access to the internet? how much recreation time will i have? can i work? i am 6'2" and weight about 185-190. i know i am probably going to have to at least once to prove myself or something. ive been doing MMA since i was 11 i am not too worried about fighting. am i supposed to hang out with people of my own race?(im white) please anybody any advice will help me greatly. i am really scarred and i do not know what to do. =(