Well, some of the Magic Monday regulars have a little dreamwidth community going at https://sanepolytheism.dreamwidth.org/

I don't know if anyone who participates has much practical experience with Mesopotamian religion, but the folks there are all very open-minded and willing to share what works and doesn't for them practically speaking, and one of the core ideas of the community is to learn from the practices that work for other traditions to get ideas for what your own tradition might benefit from.

Cheers,
Jeff