Little offtopic, so then these pages cover it: https://askubuntu.com/questions/6283...ng-auto-logins
https://help.gnome.org/admin/system-...n-user.html.en
I haven't done it - so I cannot comment.
I dont see a need to upgrade to anything higher than whats in the repo (personally I dont need the features/support it offers).
If you want to try - go for it. Best of luck.