Lubuntu
Lubuntu started life as a distro designed to run on older, slower, and lower-spec hardware, and that remains one of its selling points: It needs as little as 1GB of memory (though there are no official minimums).
But its developers have fine-tuned its approach in the past couple of releases, focusing on a light but more modern distro. Hence the move to the LXQt desktop, the Calamares installer used by Fedora, the KDE Muon software center, and the decision to drop the 32-bit version.
This distro has been my "go to" for older, lower specification hardware. I currently run Lubuntu on a 12 year old laptop and it is stable and relatively quick. Updates/upgrades are issued regularly; usually in line with Ubuntu LTS releases.
Lubuntu 22.04 desktop
Installation
The install process for Lubuntu is nearly identical to other Ubuntu-based distro installations.
It consists of:
Clicking the steps above will take you to that installation step on the official Lubuntu site.
If you are already familiar with installing linux distributions, go here to select the appropriate Lubuntu distro for your hardware: