As someone who has done a small amount of time I'll put in my two cents- count yourself lucky to have gotten federal time. Federal time is easier, though there is no such thing as parole. You'll ateast be able to educate yourself, something most wardens don't allow. 4 years sucks and it hurts my heart that another fellow citizen is being caged for something that shouldn't be criminal. My thoughts are with you, and that's real shit. I also believe that prohibition on drugs is about to be over. It's conceivable that by the time you're released the thing you were locked up for will no longer be a crime.
Hollywood wants you to believe that shortly after you arrive you'll be bullied and ass fucked for your dinner, this is simply not true. The most important strength to have is mental. The feeling of being confined wears at a man. The last few months of my life has taught me that happiness is a state of mind. It actually has very little to do with the external. If I had to assign a percentage I would say 2% of the external and 98% of the internal is what creates happiness. Stay strong in your mind, bro. Defy expectations at every opportunity. These idiots have certain expectations of you, don't play in to them. When you have the urge to smash and crack heads, give a smile and words of wisdom. This will seriously fuck with people and give them pause when handling you. I'm a master at this and it has served me well. I defy classification at every turn, you should do the same, if you don't already.
At the end of the day I can only say that I'm sorry. Be strong, like you seem to be, and come out way more dangerous that you went in. Knowledge is power, snatch it up and make them pay for it. The government forces us to complicite with all sorts of nasty shit. I say that because we will all let you go to jail. We won't storm the lawn of the white house, a huge angry mass of wronged people seeking blood retrobution. This is why I say we are complicite(am I spelling that right?). My point is, now make them into the cocreators of an evil genius. Learn, mang, learn.
Good luck :^(
Hollywood wants you to believe that shortly after you arrive you'll be bullied and ass fucked for your dinner, this is simply not true. The most important strength to have is mental. The feeling of being confined wears at a man. The last few months of my life has taught me that happiness is a state of mind. It actually has very little to do with the external. If I had to assign a percentage I would say 2% of the external and 98% of the internal is what creates happiness. Stay strong in your mind, bro. Defy expectations at every opportunity. These idiots have certain expectations of you, don't play in to them. When you have the urge to smash and crack heads, give a smile and words of wisdom. This will seriously fuck with people and give them pause when handling you. I'm a master at this and it has served me well. I defy classification at every turn, you should do the same, if you don't already.
At the end of the day I can only say that I'm sorry. Be strong, like you seem to be, and come out way more dangerous that you went in. Knowledge is power, snatch it up and make them pay for it. The government forces us to complicite with all sorts of nasty shit. I say that because we will all let you go to jail. We won't storm the lawn of the white house, a huge angry mass of wronged people seeking blood retrobution. This is why I say we are complicite(am I spelling that right?). My point is, now make them into the cocreators of an evil genius. Learn, mang, learn.
Good luck :^(
and/or just out of curiousity, which is kinda understandable, sadly. 
which resulted in half the prison getting 'tipped' (slang over here for getting moved somewhere else when its not your choice) including myself, finding myself on an almost continuous circiuit of about 5 facilities...they call it "transport therapy" which totally fucks your chances of settling in to somewhere...
and then a screw came and told me "#1, you're on the next truck!" Fuck!
