I got a Moka Pot for Christmas, too! I used this is great video from James Hoffman to optimize the coffee I made with it. (for deliciousness)
In addition to the work you've done identifying the ideal grind size, he explains adding boiling water to the reservoir and other tips to avoid bitterness in the final product.
In addition to the work you've done identifying the ideal grind size, he explains adding boiling water to the reservoir and other tips to avoid bitterness in the final product.
https://youtu.be/BfDLoIvb0w4?si=DfuPURs5cJ5z-Adg