Congrats on retirement and happy birthday! Not bad to be free at 51! I like your game plan for 1/2, taking D13 to school, working out, and fixing up the house. Now make it happen.
It terms of the anger, it's good you're recognizing the need for help. I certainly understand the thought of OM setting you off. The thing is, you're going to need to deal w/that anger regardless of whether you and W reconcile or divorce. Either way it's going to be there, so best to proactively seek out positive ways to address and process it.