birwin, I'm so sorry for your loss.
You are doing great ... I love what you said about the power of choice, and your gratitude for that power. That power will see you through, absolutely. You've made a really good choice, and it will get easier with time.
My food and tiredness were kind of crazy the first few months, and then it settled down into a healthier routine. Please be gentle with yourself as your body adjusts ... you will feel better.
Don't be too surprised if sometime you experience a thought about wanting to drink, at some point in the future. It doesn't mean you've made the wrong decision, it's just that addiction will kind of "speak up for itself". But we don't have to listen!
Take care.