There's not much you can actually teach to someone in an hour, especially about programming. So much of it is dependent on other computer skills...I once taught a class for five hours of introductory programming, and while some people learned things, we were frequently caught up in things like people saving filenames of "folder/hello.rb"...that is, the forward-slash was part of the filename, not the path...which I didn't even know was possible on any platform.

But what you can get across, and the OP seems to have done this, is how accessible programming can be. I don't know about RStudio, but jumping into a REPL is easy enough in any modern languages, as is running a script. We take it for granted, but very very few people who haven't programmed realize that a "program" is simply composed of text. Hell. most people don't understand that about web pages.

So even if you won't teach much in an hour, overcoming that intimidation factor of "where/how do I even start?" is still pretty huge.