Made a step by step for newbies like me, feel free to improve on it.
First invite the WarzoneBot to your discord (need to be an admin): WarzoneBot#2402, or go to the warzone or clan league discords
To get onto the real time ladder:
1) register into the CLOT:https://www.warzone.com/CLOT/Auth?p=3719108305
2) Link your discord to your warzone account through the CLOT:http://wzclot.eastus.cloudapp.azure.com/me/
You need to privately message the WarzoneBot using the token given on the webpage with the following command: "bb!linkme token"
Once this is done, all you have to type is bb!rtl -j to join, and bb!rtl -l to leave!
Also, you can type bb!help rtl for commands.