Hi calo2211, and welcome.
Hopefully somebody with more experience can offer their insight.
I am a licensed Affinity (v2) user which includes their DTP and Photoshop equivalent. There are some threads here on getting it to work in Linux (with less success in Zorin).
I use it running in Winboat on Zorin. I use this for quick edits, if I need to do more sustained work I dual-boot. Winboat frames the app in a native window in Zorin and allows full access to the Zorin file system. This may at least be a partial solution, installing your CorelDraw in Winboat or another VM, if you have sufficient RAM.
People always recommend GIMP. I have never got on with it or found it sufficient for my professional needs (having used Photoshop from V2). I have found Krita (in the Zorin software store) to be a much better alternative, albeit with its own learning curve. Their are good online resources available.
Krita does CMYK and appears to have spot colour support although its not something i've used in 20 years (that was on Mac QuarkExpress).
It may offer quite a bit of what you are looking for.
There are several Inkscape users on this forum for vector graphics work, I don't have any experience with it.
I am hopeful for a long term solution, in that the CEO of Affinity/Canva recently hinted that they are looking at developing a Linux version.
I also found this, a commercial product. All I know of it is their website:
"AI based" puts me off, but that might be more of a marketing gimmick.
So, not answering your question but hopefully some helpful tangents.