why do you want to use sudo? As normal user you can run most of commands.
If you are the only one user do not need sudo, use "su" instead with the admin password.
Sorry i do not understand that parte about "abductions", what do you mean?
And about "giving away" personal information it is the opposite, at least most americans and (north)europeans are "closed" to themselves.
Europeans from southern countries are more like us latin americans, friendly and open.
There is a movie from 1992 with Robert Redford, "Sneakers". It is about a team of hackers, in a scene they face a door with an unexpected smart lock and find the right strategy, just kick the f* door.
Right, and while in the install process, and the installer detects there is another os in your drive, "tell" the installer (there will be the option to do this) that you want both systems and choose the order of prefered booting. It is the simpler way for a new user.
I have been using linux since 2000 year and at firts had to learn how to configure lilo to get my cdrom working. When distros changed to grub i quit learning that stuff. Used my time learning other things, like R or chempaint.
No one should begin tinkering with grub and other sensitive parts of your system, begin with the command line and system tools first.
I do not use windows since year 2000. What windows version started that? Remember that there was a windows bootloader that could do this but i did not care to learn about, it was not worth of.
I do not know about W11 (using only Linux since 2000) but usually when installing Windows this is going to wipe out your whole disk, including any other os.
That is why to have two (three or four) os you should install windows first, then any other os, the opposite is more like...a problem.
With that background and do you really need suggestions?