I've been using Ubuntu for several years but would definitely qualify as a 'casual' user. Fairly comfortable with the command line but I generally have Google open on another screen if I'm doing anything complex. ;-)
I'm currently running 16.04 which I upgraded in place from 14.04. I have 4 partitions on the primary drive: sda1 = root; sda2 = linux-swap; sda3 = /home; sda4 = data.
I plan to do a clean install of 18.04 on a new SSD that I will add to my system. Once 18.04 is installed I plan to mount the existing /home partition as /home and dual boot until I finish configuring 18.04 so I'm not under any pressure to get everything running on 18.04 in one day.
The Ubuntu Community Help Wiki (https://help.ubuntu.com/community/HomeFolder) says "If you wish to share a separate /home between several Linux distributions, do not forget to use different usernames."
Does that mean I need to use a different username for my 18.04 installation if I want to share /home?
I'm not going to continue using 16.04 once I have 18.04 configured. Would I be better off to simply copy my data from /home on 16.04 to /home on 18.04 as I move over?
Are there any other recommendations, suggestions, or landmines that you would point out?
Thanks for your help!