Don’t worry, it takes a little time to learn the solid logic behind lines creation (eventually I make a video to show the workflow-edit: see at the end of this post * 
).
But for the moment you can take advantage of my example file and use the lines I created for your Projects:
Method 1. (import the lines in your current Project from my example file, after you have downloaded it):
You can import the lines in your current Project using the Library Manager (from menu Library). Open the dialogue and follow the numbers:
Method 2. (maybe preferred if you want the lines always available):
Open the Lines Dialogue (from menu Library) and follow the numbers:
The lines will be accessible from the panel for all future Projects:
(*) EDIT:
@Lynn_Newton
I made a video to show the line creation workflow:
