I have a very, very old laptop with me. I don’t know the exact specs, but it has a single core celeron processor and 4GB of RAM. It’s an old little thing, maybe 15 years old.
I installed Debian on it with LXQT and it was chugging hard. I don’t expect it will run modern browsers anyways, so give me your best distros that can run on a potato and have a GUI.
In that case I’d go for something very barebone. Get a minimalistic debian up and running, and see how that works. There are plenty of lightweight desktop environments (to the extent some of them count as desktop environments), where TWM is an extreme example.