Technically, Ubuntu supports it’s LTS versions for something like 12 years I think?
Anyway, you can get Ubuntu 14.04 LTS still with the i386 32bit ISO.
https://www.releases.ubuntu.com/14.04/
I personally would install that and install something like FVWM95 or Blackbox WM or some other ancien desktop environment.
I’ve been running Linux on Nvidia graphics for 24 years. It’s never been an issue.