Very good idea. I had one and it helps to give you a visual of your progress. And yes the changes have to be for you and for real. If / when he decides to return /reconcile? You will need to be that New and Improved Woman. Reconciling is no walk in the park.
You are getting fabulous advice here. I also love that you are open to all the advice. Being open will help get results. I am "terrible" at explaining how to get from point a to z ... but these ladies know their stuff.
When I started my journal and would put where I wanted to be in a month or a week? I thought I was better off hoping for Miracles... he would never say he loved me ,,, he would never kiss me again.... he would never drop the OW stop dreaming.... be realistic. Wrong~!~ as things started to turn around and I became stronger ? My goals were reached and I would even put the word Miracle in my thread title.
Anyway ,,, take care and keep posting. I told you the people here were fabulous. God bless, Ali