It’s possible to get a Unity-like experience with Gnome, however its not as easy as KDE, Linux Mint (Cinnamon), Ubuntu MATE, Xubuntu (XFCE), or LXLE (LXDE).
The advantage is you will have the same selection of apps that you had in Ubuntu.
Dash to Dock: https://extensions.gnome.org/extensio...
Hide Activities: https://extensions.gnome.org/extensio...
Better Volume Indicator: https://extensions.gnome.org/extensio...
No Topleft Hot Corner: https://extensions.gnome.org/extensio...
Impatience: https://extensions.gnome.org/extensio...
Flippery: https://extensions.gnome.org/extensio...
Ambiance Gnome: https://www.gnome-look.org/content/sh...
Global Menu: https://github.com/lestcape/Global-Ap...
HUD: https://github.com/p-e-w/plotinus
Terminal Commands:
$ gsettings set org.gnome.desktop.wm.preferences button-layout 'close,minimize,maximize:'
$ sudo apt install ubuntu-wallpapers ubuntu-mono dmz-cursor-theme
$ sudo add-apt-repository ppa:noobslab/themes
$ sudo apt update
$ sudo apt install arc-theme
$ sudo mv ~/Downloads/Ambiance-Gnome/ /usr/share/themes
1:29 Downloading Extensions
2:19 Customising Dash to Dock
4:03 Terminal commands
5:33 Setting the themes
6:08 Plotinus installation
8:11 Demoing Plotinus
9:11 Final tweaks