Are you sure QubesOS is the correct distribution for you?

Hey I see you are trying out Qubes! But I think you got sucked down a bit of a rabbit hole here. CPU pinning is a very deep customization, it is absolutely not necessary, and is a case of the author of the guide wondering "can I do this?" and finding out that yes, there is a way. But I would suggest that you not worry about it, as the difference in performance may not even be noticeable to you.

The best way to approach qubes as a new user is to do almost nothing to modify dom0, and do all your playing around in the qubes.

Also, for in depth tech support like this I would always post to the Qubes forums. Its a niche OS, so posting on a general Linux forum is probably going to not get you a ton of help.

Learn linux like everybody first, install an easier distro like debian or mint, play with that. After a few months delete everything and reinstall domething else. Keep data on external disk to not loose it. This is the way to learn. Do not learn to unicycle before knowing how to walk.

You probably shouldn’t be running qubes, either because your hardware isn’t up to it or because you aren’t up to it.

Nothing wrong with not being up to it. That’s a weird operating system that’s basically a research project. It’s just about like saying you daily drive 9front.

Your link doesn't work, but just from the looks of it, you have a volume that is already attached to a VM, and you're trying to use it elsewhere?

also if u have good tech sites/communites/subreddits/anything to suggest plz do