Vrftjkry

Having lots of issues after a clean install of High Sierra.
Some I fixed, but some are still going on.
Main ones now are:
(1) Problems with AppleID
(2) Cannot access iCloud: files or email for it
(3) Lost some of my keychain info (all Passwords on Safari) even though I saved the folder, and was supposed to by synching via iCloud

I disabled SIP temporarily for various reasons but maybe doing that also allowed me to corrupt something when adding back my data or apps?

In most cases I reinstalled from the AppStore or their websites.
But I also got error messages related to using Two-factor Authentication, so maybe a keychain file is wrong/corrupted??

I had a permissions issue, but I fixed that by following Apples suggestion to run the following in Terminal:
diskutil resetUserPermissions / id -u

I also have some issues with logging into my appleID, but not everywhere I try it.
On the appleid.apple.com website it works fine, same email + same password as always.
But on System Preferences (iCloud or Internet Accounts) on my MacBook it gives me an error: "This action could not be completed. Try again"

I cannot delete/remove iCloud unless I can log into AppleID on SystemPreferences.

I lost the ability to use sudo in Terminal, but was able to get it back.
The error message after running sudo was:
"/usr/bin/sudo must be owned by uid 0 and have the setuid bit set"

There was a very helpful post on the superuser forum:
sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set [OSX]

I ran the Script Editor script he suggested logged in as Root, and it seems to have worked: I can now run sudo commands.

Based on other user posts, here are the outputs from various Terminal commands:
"which sudo" gives "/usr/bin/sudo"
"echo $PATH" gives /Library/Frameworks/Python.framework/Versions/3.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin"
"ls -l /usr/bin/sudo" gives "-rwxr-xr-x+ 1 root wheel 370704 26 Oct 21:00 /usr/bin/sudo"

I am going to try the following if nobody has some good ideas:
(1) Reinstall my OSX
(2) Ask Apple Support to check my appleid: I suspect I might have a 2nd one from somewhere but was not intentional.