I daily drive a netbook and I use Debian 12 with KDE Plasma on it. The netbook is a 2014 ThinkPad 11e with a Celeron and 4GB of RAM. I find it comfortable for writing and even some Python and JavaScript development. I remote into my servers/cloud infra for more intense development tasks.
+1 for upgrading whatever you can before installing linux. An SSD in particular will go a long way to make it feel snappy.