Admittedly much more complicated than necessary, but it's pretty full featured.
first line constructs a filename for the new script from a generated 10 character random hash and prepends "nscript" and a user provided name.
The second line writes out the shebang and a few oft used bash flags, makes the file executable and opens in in my editor (Helix in my case).
The third line is just a shortened alias for the function.