I've done a few now. I did mine almost the same. I added a network profile so that it could connect to the wifi. I do tend to get an error at the end but it didn't seem to ultimately matter. After I got the error, I logged in the Apple DEP site. I saw the new "Devices Added by Apple Configurator 2" server with the iPads that I just used the Configurator on. I used the Manage Devices to assign them to my "Meraki MDM" server. Once that was done, I was able to finish the setup on the device. The iPad has a new Remote Enrollment setup page telling basically that you can opt out using the settings app. After you "Next" your way out of that, it downloads a configuration and you have the home screen on the iPad. I went to the Meraki DEP page and did a full sync and the devices were now available to assign settings just like if they had been purchased with DEP. I don't know if this makes a difference but I am the Apple DEP account owner not an admin.
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