I'm required to use Ubuntu at work. Coming from Mac, apart from the menu bar at the top, on Gnome, I've been able to customize the keyboard shortcuts, remap the keyboard so that Ctrl works like Cmd, and use extensions like Dash to Dock[1] and themes like Whitesur[2] to replicate something that almost works like a Mac.
The keyboard remapping and customizing keyboard shortcuts were all done within default the default settings app.
The only things missing are some keyboard shortcuts like Ctrl+A/V to move to the beginning and end, and the Ctrl+Shift+C/V behavior on the terminal instead of Cmd+C, which I've just worked around by using VSCode's terminal and configuring it to copy when I press Ctrl+C with some text selected.
[1] https://extensions.gnome.org/extension/307/dash-to-dock/