(Edit: I just read the accent on multiple folders...I'll keep digging).
On the API, I barely know what it means, as well. No worries.
Since your list is static, we should be in good shape.
One of my favorite things about Flow is there is always a few ways to do 'a thing'.
Here's one -
You can create one from a blank - My Flows > Create from Blank (Or new version says "Instant - From Blank)
Search for Sharepoint triggers and find the one that says "When a file is created in a folder"
Ser your site address (drop down) and select the folder.
Next, find your email client (Outlook?) and look for an action "Send an email". Fill out the stuff and try it out. Here's a pic of one I built:

Will that work? Keep us posted and good luck!
-Ed-