I am not recognized as an administrator on Windows 11

I am not able to access a number of features on my own home computer, which I'm certain is due to upgrading from Windows 10 to 11. Nothing I've found in other forums works, because when I do any of them, the immediate response from my system is to tell me that I do not have access and need to contact a system admin/IT department.

For starters, I already tried the proposed solutions below:

Here is some troubleshooting that you can try to fix the error.

Solution 1-Checks the file system and file system metadata of the hard drive for logical and physical errors.
1-Right-Click on Start then click on Windows Terminal (admin)
2- Type these commands.
chkdsk c: /f /r (and press Enter)
3-This command will require a reboot to run

Solution 2- Check if doesn't have any corrupt files on the windows.
1-Right-Click on Start then click on Windows Terminal (admin)
2- Type these commands.
sfc /scannow (and press Enter)
Dism /Online /Cleanup-Image /ScanHealth (and press Enter)
Dism /Online /Cleanup-Image /CheckHealth (and press Enter)

3- The DISM tool will report whether the image is healthy, repairable, or non-repairable. If the image is repairable, you can use the /RestoreHealth (Dism /Online /Cleanup-Image /RestoreHealth) argument to repair the image.

Solution 3- Check the user account rights
1-Right-Click on Start and select Run
2-Type: netplwiz and click on OK
3-Select the user account and click on Properties
4-Click on the "Group Membership" tab, select Administrator, and click on Ok

None of those work because they require me to already be recognized as an admin. I've also tried using PowerShell and Computer Management apps, but again, those also require me to already be recognized as an admin in order to allow myself to be recognized as an admin. Do you see the ridiculous problem the shoddy update has created here?