Welcome Lunatic. Your story is very familiar, and you definitely aren't alone. SR is a great place to help you learn how to obtain a sober life, it has really helped me. Read a lot and ask lots of questions.
And it's perfectly normal to be scared, fear is your body getting ready for a challenge. You mention that you are scared that getting sober is going to be the hardest thing you ever had do to - I won't lie that it was one of the hardest things I ever had to do. But it is worth it, and the alternative is much, much worse.
Again, welcome and let us know how we can help.