Jim - another fan here....I also think you're doing so well. Bearing in mind it is only a couple of weeks since your S, you've really made lots of progress - and lots of positive stuff underway.
In respect of your W, I agree it's helpful to keep channels open. Be the man you want to be going forwards in your communications with her. At the moment, your R is about good co-parenting - and you can liaise with your W in a helpful and positive way. If she responds with something pleasant, or initiates something nice, you can respond in kind.
But I wouldn't be OTT with the 'chirpy' contact, and if your W seems to be getting annoyed, you can always pull back to minimal, but helpful & pleasant.
Sounds great with the cooking. When I was at M&Ds, and looking forward to a place of my own, that was one of the things I was looking forward to...and as you say, great for the budget!
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus