Congratulations!
This should be the first, last, only time you go.
Approach it that way and do what you are told, make yourself a "model student" and "graduate with honors". The people at your facility are proffesionals and know what they're doing; respect that and be willing.
Sobriety, detox, rehab is lifelong, not temporary and we are going to begin treatment for life, not to "get fixed" or cured. THis is where we begin to receive the tools and develop our sobriety plan.
If you embrace the change you'll become willing; and gain the respect for yourself and YOUR sobriety that is necassary to maintain it.
Work hard, enjoy and embrace this beautiful opportunity...
YOU CAN DO IT...heck, I did!