The operation is very simple due to its friendly user interface.
To use it, download and install Rockstar Games Launcher on your PC.
Here is a related post for you Rockstar Games Launcher Download & Install for Windows 10.

Besides, you’re free to run into another situation Rockstar Games Launcher stuck in offline mode.
The launcher cannot connect to the internet.
The common reasons for this could be antivirus, firewall, minor bugs, and more.

How to fix Rockstar Games Launcher offline mode?
Dont worry and this issue can be easily fixed after trying some solutions.
Lets look through them.

Remember to run it in compatibility mode.
give a shot to delete this folder to fix this annoying issue.
After the deletion, restart Rockstar Games Launcher and see if the offline mode error persists.

If not, continue the fix.
Disable Antivirus Program
The antivirus program sometimes can stop the running app and cause some issues.
Besides, you could allow Rockstar Games Launcher through the firewall.
So, have a shot.
Just download one and use it to get rid of the issue of Rockstar Games Launcher offline mode.