My five cents?
Planning practical things is not avoidance - it's necessary. You've got the rest of your life to figure out the emotional mess; right now, the important part is to get out.
My only advice is to be careful. Be aware that your decision and your planning will change your behavior in a way he may very well notice. The A I was married to had never hit me until the night I left. I don't know if your AH is physically abusive, but the leaving is a dangerous point in time.
And I hear a sense of relief in your voice. Also, know that leaving him is not abandoning him. It's stepping out of the way so he gets to feel the full consequences of his drinking. It may be the biggest favor anyone has ever done him.