Been there and done that Twice!
The problem that You are going to run into is going to hit You at several angles!
First that Carpet was laid down before the Interior and even possibly Exterior Walls were put in place! It may be Taped and glued in spots and will have #2 reason securing it in place.
Second the Junior employee at the Factory who actually attached Your Carpet to the sheet of Flooring Material had a penchant for firing the staple Gun! I'm pretty sure He was playing Shoot the Bad Guy and thought the Staple Gun was a Machine Pistol! There were literally Thousands of Staples that had to be extracted and pulled from the substrate before I was able to even think about installing the New flooring!
By the time You get through Pulling and cutting Your "Pattern" will be almost certainly useless!
I'm not saying don't do it , but I am saying be prepared to sweat and swear...a lot!