It's not difficult at all.
> How to Replace the SSD in your Mac mini (2024)
https://www.ifixit.com/Guide/How+to+Replace+the+SSD+in+your+...
from the link:
> Apple integrates the storage controllers into the Apple Silicon SoC, which means that normal M.2 SSDs are incompatible.
from the link:
> Apple integrates the storage controllers into the Apple Silicon SoC, which means that normal M.2 SSDs are incompatible.