external cam haha. I use the laptop cam daily to video call family
I actually did that on desktop recently and I enjoy being able to unplug and physically remove it as I don't use it daily. Same for the large external microphone, it's only on my desk when I'll have meetings planed. Maybe you could also use a mobile phone as camera.
Anyway kudos on leaving Google! It's a great step.
For Samsung chips maybe https://wiki.debian.org/InstallingDebianOn/Samsung could help.
For the curious https://lvra.gitlab.io/docs/hardware/#xr-devices according to which quite a few WMR VR HMDs are supported via the Monado SteamVR plugin.