How to add the RTX 2070 eGPU on 2017 MacBookPro with ubuntu 18.04?

Since this will be my first time trying to use the external GPU card on the Apple laptop, I need your suggestions since this may involve a lot of steps.

Actually I fond that Razor Core X enclosure which supports the Nvidia RTX 2070/80, but it only supports the Window version not the Ubuntu 18.04.

Can someone give the suggestions on that?