Once you have done this, there are a number of ways you can configure the RStudio interface to prepare it for your users. For example, you can change the theme, increase the font size, and create a starting file:
You can take a look at all the ways you can customize the RStudio interface here!
If you create a file, make sure you save it in the /home/nt-user/workspace directory! This will be made available when you save the file for the first time:
Before saving, make sure to Exit RStudio to ensure it's settings are in a consistent state, otherwise users may seen error on startup.
Finally, be sure to click the Save button when you are done! This is required to persist the configuration changes you have made.