I need advice about Windows 11 on my old computer

[Paper Roses]

I have an old Dell Desktop computer that has been updated from Win 7 to Win 10 .Do I have to buy a new computer? I did a system check this AM and the message said this desktop would not support Win 11.Should I try to find a reconditioned computer that will have Win 11??
The repair folks who helped me prior to this have both gone "corporate". They no longer will fix PC's, nor will they do house calls.
As an old timer who cannot even lift this tower, I'm sunk. I can't take it so a repair shop.
Don't know what to do or if this machine can somehow accept Win.11.
Any advice for this old timer who is a very simple user?
Except for a messed up "Hotmail" layout, everything I use works fine.

I'm afraid that I have to get a new machine and it is impossible now since I live on SS and that may disappear.
Keeps me awake, no wonder my blood pressure is up.
Any ideas will be appreciated.
Thanks,
PR