Your instructions say to Tor's configuration file is named 'torrc'.
Locate the file on your system, open it with a text editor and add the following lines:
ORPort 443
Exitpolicy reject *:*
Nickname ididntedittheconfig
ContactInfo human@...
The thing is, you don't say "where" to insert these lines, and there's really no specifics as to how exactly to edit the file....can you elaborate on this please, and be concise...I'd like to set-up and establish a good working relay....thank you for your time