I also have a netbook with an Atom N2600, I overclocked it from 1.6GHz to 2.0GHz, upgraded from 1GB to 3GB of RAM, and replaced the old HD with an SSD, I then installed MX Linux, 32 bits version, Xfce, and it works pretty well. Only huge webpages are slow, but everything else is about still usable
Just use Debian, it has old root, stable, still being developed, it’s the base of various others distro that “enhance” it (sometimes badly).
Debian.
I’m using MX Linus AHS, based on Debian, BTW.