My ex- and I lived together during our divorce and after until we were able to sell the house, which was about five months.
I moved into the guest room and bathroom. We kind of just did our own thing. I worked to keep it pleasant and non-divisive. I was getting what I wanted, the divorce, which he did not want. My only suggestion, is that it sounds like you also are getting what you want, so "play nice" so that things will go as smoothly as possible.
If it gets too much, go to your room or leave the house for a while.