How do I make a typeface outlined

how do i make a typeface outlined only?
outlined type may not be ideal as a text type, but what I am making is a display type, the outlined origami pattern.
when I use a pen tool and draw a line without closing a path, it remains as a stroke after I see it as preview.
however if i close the path, then it fills the inside of the closed path.

I mean, if I use Adobe illustrator, a pen tool, I can easily make a stroke and give it thickness or anything.

how can I do it with glyphs?

Filter > Offset Curve, with “Make Stroke” checked.