Most definitely I was scared when I first when to detox then again when I checked into a rehab facility. Your fears subside with the time spent with others who are in the same lifeboat that you are, at least in most cases that I know about. It is even more frightening to think that you can continue on in the same way without change.
Whatever program or methods you use to get you along your way, that is a good thing. You may add or remove certain practices, as I have, but the primary thing is to commit yourself to it. It's hard to give up drinking (or any addictive behavior), but I'm enjoying a better life for my focus upon it.