How to make a Katana Blade?

I'm a Engineering student and i just started onshape about 2 months ago and during my free time I've tried to make a katana blade yet i can not find a video on it so i decided to ask the community here.
I've tried using the chamfer to make the edge but i just cant seem to figure it out since the blade doesn't look sharp and i cant make the tip of it

Answers