Having interacted to a friend for designing operating systems, I have enlighted myself having difficulties composing non-deb systems for the Linux newbies, which they can be m$-refugeed but also can be new to the desktop hardware systems, now I have been dropped to, featured to, but not limited to,

1. openSuSE Tumbleweed and SuSE studio,
2. pacman and pacstrap,
3. LXQt to be my featured and default desktop shell,
4. qterminal to be my default graphical term,
5. Qupzilla and Claws mail to be my default web clients.

So, how to start composing my non-deb systems for the above beginners?

I'm not quite clear on what you mean by "composing non-deb systems," but I'm guessing you mean composing presentations or training on non-deb systems. Here are a couple of thoughts:

Mageia also uses RPM packaging. Mageia. SUSE, and RHEL/Fedora RPMs packages are not necessarily compatible with each other.

Mageia's Control Center and OpenSUSE's YAST, both of them GUI tools, are both very nice pieces of work. New users can administer their systems very nicely through them and then, if they wish, learn command-line tools at their own speed or even not learn them if they don't want to.

I've grown quite fond of Mageia, having used it off-and-on since v. 3.

(Hope I'm on the right track of what you are looking for here. If not, please straighten me out; doing so may help other posters.)

Here, my ''non-deb systems'' also need to stand for the Arch derivatives, you should have seen ''pacman and pacstrap'' under my thread.

I did see the references to Arch. I played with Arch once just for fun, but that was five or six years ago and I'm not at all qualified to speak about it.

I can talk for hours about Slackware.

You dnt need to tell Slackware to me which I look it TOO ANCIENT.

Mageia... I look and worry its urpmi package manager (also one for ROSA and openMLx) too minor, whose communities are looked too little, which I am unsure if the beginners will be impatient...

PCLinuxOS? https://distrowatch.com/table.php?di...tion=pclinuxos

Surely it packages rpm binaries, but unsure if it's urpmi, apt-rpm, or being an individual rpm distro, DistroWatch has not stated which rpm system it is run under, Wikipedia has also been puzzled to this.

Finally, up to now Tumbleweed, Antergos, ArchBang, ArchBox, Bluestar OS, Chakra, KaOS, Manjaro, Ninja OS etc, are best to beginners, which EVERY are rolling and with a desktop which you dnt need to worry for lifecycles and how to install them.
But of course I have also authored and cloned PLENTY Tumbleweed derivatives for examples, even they are ENTIRELY FREE SOFTWARE, like Parabola, an entirely free Arch derivative.