I can't really give you an answer here, but I can give you some advice. I also know this frustration from some past orders. I eventually cancelled them and bought them from the competition, sometimes for more money.
So I also recommend that you simply cancel the order and buy the device somewhere else if you want it immediately.
Unfortunately, it is not possible to use the USB-C socket to connect a device for projection. The USB-C socket is only used for charging. The USB-A socket can be used to connect a USB stick for projection.
Function of the USB ports:
USB-C - Power only.
USB-A - USB stick with multimedia data.
User manual:
https://d2211byn0pk9fi.cloudfront.net/spree/accessories/attachments/78786/Nebula_D2421_Manual.pdf?1569809400
The Capsule II now has a USB-C charging input, a higher resolution of 720p, a brighter image of 200 lumens, a more powerful 8W speaker and the Google Assistant feature.