Well I'm just a rando, and you didn't ask me, but I agree with the sentiment, so: Fedora. Or openSUSE. I'd be more comfortable giving a newbie Fedora.
I was a Debian devotee for nearly 25 years, but I've found it to be less foolproof and fault-free lately, and it has always lagged behind current package versions in Stable, forcing you to run Testing (or -backports) or even Unstable to get newer versions-- with corresponding potential for breakage.
Debian Stable was very out of date 25 years ago, but ever since mid '00s (after Ubuntu got popular) it improved by miles. Debian Stable is akin to Ubuntu Stable LTS. Ubuntu Stable non-LTS is a 6 month snapshot from Debian Testing, does not get supported for long. If you run Debian Unstable, you're probably running something akin to a rolling distribution. What is best all depends on your goal and purpose of the task. Personally, I very much like the Debian ecosystem and would prefer any Debian(-based) OS. However these days, Docker can trivialize a lot (and also mitigates your mentioned issue), ZFS and other filesystems allow to rollback in case of issues (useful on a rolling distribution, but also on Debian Unstable), and hypervisors allow snapshotting, multiple OSes, and all that, too.
For a server I'd recommend Proxmox (especially since ESXi is now only for enterprise). From there, have fun with different OSes.
Proxmox on a desktop is a bit meh, but possible. There's a lot of useful Linux desktop OSes out there. For example if you want to perform pentesting you can use Kali Linux. The one which interests me most from a security standpoint however, is Qubes OS (Fedora-based, sadly, but you can run anything on top of it). For gaming, SteamOS is neat (Arch-based, these days) and could even be fun to have a kid play around with Linux, too.
As for macOS, I played around with Hackintosh a couple of times in the past with success. But I never liked it much because you'd lag behind on security patches, and every new update would be praying it'd work. I did get it to work under Proxmox though, that was fun, but had to install a second (dedicated) GPU for that. I latest M-series ARM-based Macs work very well, only disadvantage is the fat price upgrade for RAM and SSD (often even soldered!). That part is terribly sad.
I was a Debian devotee for nearly 25 years, but I've found it to be less foolproof and fault-free lately, and it has always lagged behind current package versions in Stable, forcing you to run Testing (or -backports) or even Unstable to get newer versions-- with corresponding potential for breakage.