You press go live on one of the two platforms, wait until the post is created on the blockchain, wait 5 minutes go live on the other platform and from than on you can start streaming.
Note that the more platforms you stream on the more you also upload, if you notice lag of any sort you might have to lower your bitrate in OBS accordingly
Perfect Thats all i needed to know thanks so much bro
Anytime, enjoy your streams ;)