don’t expect a 19 year old laptop to perform all the tricks something more ‘modern’ can do, such as transcoding video for a streaming media server. also note that a t5600 is not a ulv chip (draws as much as 34w under load, on its own)–so probably not a candidate to run ‘lid down’ without some outside help for cooling.

it’s not fast, it’s not power efficient, it has slow networking (10/100 and 22-year old ‘g’ wifi), and lacks usb3 for ‘tolerable’ speed on extra external storage space—but it will be ‘ok enough’ for learning on.

if you go with something like yunohost or even dietpi, you will pretty much restrict yourself to what it can run and do and how it does it. if you want more ‘control’ or to install things they don’t offer themselves, you’ll need to ‘roll your own’. a base (console only) debian would be a great place to start. popular, stable, and tons of online resources and tutorials.