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try this one. Just so you can see what I did

Ye…. sorry about that , I can send again if you like. Anyway just start by anchoring your first line.
I saw that the top line was only anchored on one end.

I don't know if you have the attach to tool but you can use that to anchor your first line and build off of that.

Here it is. I had to turn some of the restrictions off to move it.
Sometimes when you do an irregular polygon with snap to grid on you have to make your grid smaller or turn it off to move the fixed...

are you using "snap to grid" ? that will help to keep the lines square with the board as you draw them.

It is under the layout tab at the top of designer