How to transfer singleplayer saves to another computer in Minecraft?

Alright, here's the problem. I'm in AP US History and my teacher loaded a TON of projects on us right before school gets out. One of these projects is to detail 'American Exceptionalism' in "an insightful yet creative fashion". So I decided to make something in Minecraft to show it off, but there's a problem: I don't know how to successfully transfer a single-player save to another computer via flash drive. Does anybody have a clue where the files are for saves? Thanks ahead of time for any feedback that could help.

On PC, type "%appdata%" without quotations into the Windows Explorer (File Viewer) search bar. Open your ".minecraft" folder and find the sub folder called "saves". Locate the name of the specific world, Copy that entire World Folder onto your Flash Drive, then drag & drop your world folder back into your saves folder on the second computer.
Remember,
%appdata% --> .minecraft --> saves --> SpecifiedWorld

What you do is find in your user files where your Minecraft file is located. For example: H:/Users/Johnny123/Minecraft. Then find the file called worlds or saves. Make a copy to your desktop and email it to yourself. It might be in the bin folder I don't remember.