I absolutely agree with Bevin. I'm currently doing an outpatient program but, if I'd been able to swing it, I'd have definitely considered inpatient. It's the most intensive way to begin your sobriety.
That being said, you need to really look at what you want and need. Having not been down this road before, I'm sure that's hard to gauge. I suggest you begin with an evaluation at a treatment center. They'll be able to help you navigate all of your options.
In the meantime, check out AA. It certainly won't hurt! Sit back and listen. If you want to talk, you'll have willing listeners. And you'll find others who've gone the IP or OP treatment route who can share their stories and experiences.