You might have read about this one somewhere else but it's the first thing I do whenever I get into VSCode. Moving the sidebar to the right side helps you open and close it at will without moving your main editor.
Check out how awful the default experience is:
And check how great it is after the change:
Other benefits include that your unused space gets used and you may cover the side without ruining your experience
This is very easy to set up, just right-click on the sidebar and select Move Primary Side Bar Right or go to settings and search for sidebar.
If you liked the way your code looks now, you'll love seeing all the code history on VSCode.For this we built Watermelon, a VSCode extension that gets the historical context of your code to make it easier to understand.