Im a newbie and I know the commands on the website but where should I paste commands, Can anyone please give a detailed instructions.
i want to configure it to read only mode
Refer to previous answer.
Are you referring to these instructions?
No, that is even better but more advanced.
Start with File:Live boot.png - Whonix that screen is - for now - “all you ever need”.
This one: think easy
Do not think: complex have to enter lots of commands.
Just have a good look at File:Live boot.png - Whonix - just 2 menu options. Just pick it during the boot process and “all done”.