How long is a piece of string?Really depends on what you install.'du -hs /usr /var' to get a rough idea.
Is your /home on a separate partition? If so, no need to copy anything. If you really need to backup, I'd get a proper external disk, or failing that, backup to backblaze (or similar) and restore later.At a pinch, you could tar it all up and copy it to a usb stick, if you have a big enough one to hand, but it'll be slower.
soma.fm has a pretty diverse collection of stations for different tastes.No ads too. Ads kill a radio station for me.
Find something broken/unimplemented and fix/implement it.If you can't code, you can help with documentation or by reproducing/expanding existing, but incomplete, bug reports.
I used to use rsnapshot, which is a thin wrapper around rsync to make it incremental, but moved to restic and never looked back. Much easier and encrypted by default.
How long is a piece of string?
Really depends on what you install.
'du -hs /usr /var' to get a rough idea.