I've finished my game in the editor, how do I pack it up into a file ready to ship?

Like the title implies:
I’ve finished making a game; it has no C++ source/game alterations - blueprints exclusively used. How do I now package this into a neat little launcher with an opening screen and a ‘launch’ button? I’ve not actually completed a game but I’d like to know how to do this for future’s sake.

(this question was also asked on the Unreal Engine subreddit)

Thanks for this.
I knew there would be some form of relevant documentation somewhere on the official documentation page, but I couldn’t find it.