Hi there,
I've researched for probably an hour and a half, but couldn't find a solution that works, so sorry if this has been asked a lot before.

I really want to get Clip Studio (currently using the demo), but I cannot get it to display on my tablet.

System info:
MacBook Pro - High Sierra - 10.13.6
Huion Kamvas Pro 16
I'm using the tablet as a second display.

I have the Mission Control settings to "Displays have separate spaces" and Dashboard: "As Space".
I tried right clicking CSP on the dock, and setting it to open on Display 2, but it doesn't show Display 2 as an option.
If I create another desktop on the Mac's Mission Control itself, it will show in the dock's options..

I tried dragging the bar on the display settings to be on the tablet (making it the primary display I assume). But what happens is that CSP opens on the tablet, but the tablet's pen works on the Mac monitor. Very strange...!

Plus, I don't want the tablet to be the main display.

The only way I got it to work is by having the tablet mirror the mac, but then I have one less monitor I can use for references and so on.

Any advice on this would be greatly appreciated.
Also let me know if any additional info is required.

I'm definitely purchasing CS (there's no question, it's perfect for what I need), but I feel like I have to figure this one out first.

Thank you so much,
- Liron