"Really wanting to do this" is the first step into
doing it Holly.
I believe you can get through one day. We can get through lots of things for just one day.
My suggestion is for you to keep returning here no matter if you've "made it" or not. Share, and learn from others. We understand, just as you will understand us. We all have the same problem.
The simple act of connecting with others with similar problem will help cement your 'desire' to stop into actively doing so. I'm 13 months sober and it is so much better. It can be so for you too.
Please keep posting.