As digital “artist” myself i investigate the support for tables on linux for quite some time, and it seems that DIGImend - Tablets has a decent list you can investigate about in detail, and is actively developed so for sure more will be added there.
To install it you need this package from AUR AUR (en) - digimend-drivers-git-dkms
and of course you will need the linux headers for your running one before that.
Best to try to find some answers on issue pages of diginmed github
There is a driver offered for Deco 03 on their official page
but without the hands on the tablet is hard to say how it performs and if all features will be available under linux.
Have a look at this topics:
And this one has a couple of links that for sure will be helpful
Also, depending on your preferred DE, some things might be straight forwards, or might require additional tweaking, or as presented in the last link, a standalone UI.
For now the Wacom tablets seem to be more easier to set up and use in KDE Plasma and Gnome, as have a slightly better support, but indeed are a bit more expensive due to their battery free Stylus technology.
