Word is no longer updated for hardware that old, so you are forever stuck with obsolete software. When Sonoma was released then Microsoft dropped support for anything running Big Sur & below which I assume you must be running on a 2013 MBP. The last few updates for Office on my old 2013 MBP were horrible. Word/Office 365 is so much better on my M1 & M3 hardware.
Essentially any Apple Silicon based machine will do the job for you, but as others have said the 15" MBA would be the best choice. If money is tight then the 8GB baseline version will be more than fine.
Essentially any Apple Silicon based machine will do the job for you, but as others have said the 15" MBA would be the best choice. If money is tight then the 8GB baseline version will be more than fine.