Dell XPS 13 with the "developer" label is also pretty nice so it's all good, but check that it has the "developer" label, or it will be not designed to be compatible, if I'm not wrong, the main difference is the Wi-Fi adapter. Also, out of this topic, careful with the finance and credit card, it's always a scam unless you really need it to work I wouldn't spend money that I don't have.
Yeah, I knew it, I still would get a TUXEDO computer, something like TUXEDO InfinityBook S 15 - Gen8, the DELL XPS 13 is very small, small keyboard, very portable but not really nice to work with. And TUXEDO looks much more into Linux than DELL.
Yeah, overwhelming but can be cool to learn about this https://linrunner.de/tlp/settings/index.html and https://wiki.archlinux.org/title/Tlp has some documentation, with this and some blog from a user explaining it, it should work. Also, the auto-cpufreq is pretty cool, makes your PC go slower but saves a lot of your laptop energy, or I feel like this.
Try Linux another time (I also often switched to Windows in the past until now, I can finally say I would never use a Windows/Apple desktops, I really dislike them), I often try distros on my Laptop while my Desktop has a stable distro to work with. On laptop, I just try different distros as I do like to test them.
I remember like 5 years ago I was doing the same, but then I realized Windows is even worse with many problems and limitations. I can't just go to Windows, it sucks. Maybe you need compatible hardware or some more skills on Linux to fix your hardware issues.
For just two VM, any Linux distro is enough, virt-manager to easily run those VMs up and done. The default network will allow them to communicate between their NAT. Proxmox sounds too many complications for just some testing or development stuff.
I use virt-manager GUI to control KVM easily, but you can control anything easily with virsh command lines. I dislike VMware and VirtualBox, neither needed. Also, on terminal client virsh you can do much more configurations than just with virt-manager.
Well, then I can't help, I normally always get those that cost more than 200 USD, they have it all (Bluetooth + dongle) and with high quality (+ noise-canceling). Mines are WH-1000XM4 if you are interested, and I'm very happy with them, in the past I had Bose QuietComfort 35 and Sennheiser Momentum M2-AEBT and I would still get Sony WH-1000XM4 as it is smarter with many features and quality.
More than "with Linux" you should indicate how much do you expect to spend here, it's not about the OS, it's about what kind of headsets you want (what features).
And also not built with electron... 😣