I personally prefer a KDE minimal install and installed kde-plasma-desktop and then installed what ever else I desired after that. If you decide to go this route I can post what I installed.
Something to be aware of is last I heard SDDM has problems, and its recommended to install and use LIGHTDM. You may also have the infamous polkit problem so you will need to apt-get install libpolkit-backend-elogind-1-0 to fix that.
I am very happy with KDE and devuan, experienced no problems. Basically I used:
apt-get install lightdm
apt-get install kde-plasma-desktop
encountered polkit problem
apt-get install libpolkit-backend-elogind-1-0
then my additional desired applications
plasma-desktop
...that doesn't install any of the normal Plasma related items; such as, Dolphin, Konqueror, Kwrite, etc... but it gives you the Plasma desktop. If you want to add Plasma related items, you'll have to install them separately.
Here's a link to where I built a very minimal Plasma. Keep in mind, this was done SEVERAL months ago...
]]>I would like to install KDE without too many packages. There is apt-get install kde-full.
Which installation procedure will help to install kde (just minimal packages)?
Looking forward to hearing you.
Best regards