You are scared and so you should be. Change, and the leap into the unknown is pretty danged scary. You know that you are making the right decision and you may get only one chance at this, so make it a good one. You can quit drinking for good, you really can.
I found some big boy pants in my size, and put em on. I took responsibility for my drinking and for my sobriety too. You can do the same. Say 'enough, I deserve better, and I will have it, no matter what', and things will fall into place for you. Onward!