Welcome @rich55
Would be much better to use this footprint as a starting point and then modify it to the recommended shape.
Start here:https://forum.kicad.info/t/tutorial-how-to-make-a-footprint-in-kicad-5-1-x/11092
This is part of the FAQ at the top of this page.
It is well worth learning to create and modify footprints and schematic symbols very early in your adventure. 
If you have questions or problems after digesting the tutorial, please get back to this forum. There are many willing bodies able to help.