I'm a student working on this as a project for fun, but I can't wrap my head around this. I'm trying to match the shape of this arrowhead from a series I used to read, and I've tried using swept cuts, lofted surfaces, etc, but I couldn't figure it out. I'm just wondering how I can use this sketch to cut along the contour of the arrow, ideally without needing to make a new sketch on every corner. This is just one half of the arrowhead, as I plan on mirroring it afterwards.

Here is what I am trying to make.

Here is a previous start I had to it, I couldn't figure out how to get a completely straight line down the middle. I used a lofted surface for this.