Auxetic structures - beginner support needed

I’m new to Rhino and I have absolutely no idea what I’m doing. I don’t even know if this is a good place to post for help (I’m sorry if it’s not). I’m trying to make an auxetic cuboid structure, and I’ve watched many tutorials but I still don’t get it. I have absolutely no CAD experience and I think I am cooked. If anyone has any tips for me please let me know!

There is an example file available to download, lunchbox required (run the package manager in Rhino and search for lunchbox)