Just a heads-up for anyone who is new to setting this up .... Just don't even bother going to the Official Monero Guide. Don't worry, you're not going mad, it's just hopelessly out of date.
I eventually came across this github guide that took all the pain away. Highly recommended.
A few pointers I found as I went:
1.2. Create daemon's AppVM: monerod-ws Increased size to 100G
2.2. Create systemd unit
sudo kwrite /lib/systemd/system/monerod-mainnet.service
Replaced kwrite with nano
3.1.1 Install command-line only tools
sudo install -g staff -m 0755 -o root ~/monero-<VERSION NUMBER>/monero-blockchain-* ~/monero-<VERSION NUMBER>/monerod -t /usr/local/bin/
For the correct VERSION NUMBER look at /home/user for name of the directory (monero-x86_64-linux-gnu.v0.17.1.0). That'll save you a few guesses lol.
4.2 Create communication channel with daemon on boot Replace kwrite with nano
There. Now there's my good deed for the day.