No need to complicate your life…
For some reason people always think that having seperate / and /home partitions is necessary to having a healthy Ubuntu system.
I don’t know why people keep recommending this but I am doing my best to spread the word that you don’t need to go through all that noise. If you don’t believe me you can read the recommendation from the guy that writes the installer. If you have seperate drives or run multiple distros then that’s fine. Separate partition on a laptop with one disk? Don’t need it. We’ve supported this for over two years!
As always, when touching a disk you care about with a partitioning tool, BACKUP, regardless of whatever method suits you.
Next thing you know people will start recommending clean installs instead of upgrades! (Pro tip: If upgrades weren’t an official and supported recommendation then we wouldn’t ship an upgrade tool!)