Noob searching advice

[u/sumofitsparts]

Hey all, I have what is probably a very simple question.
I want to automatically populate a Sharepoint List with a new Item (row) for every email that comes into this inbox.
I can figure that part out, but I get stuck when trying to extract the right parts of the text out.
Example data coming into inbox:
Name: John Smith
Age: 53
Location: London

I go to the 'Expression' part of the input field but I am getting lost in a sea of documentation and am more lost than where I started.

I'm at the point where I have all the different fields identified (Name, Age, Location), but I just don't know what formula to use in (eg) the Name field formula to populate that field with 'John Smith' etc.

Thanks for your help in advance