12 days
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.
https://tasks.org/