To stream to LinkedIn, you will first need to setup your stream.
To do this, visit https://www.linkedin.com/video/golive/golive.
Once here, you will want to select Go live now, select the source or page you wish to stream from, and create your post.
On the bottom of the page, you can then select your region and click Get URL. This will generate a Stream URL and Stream Key that can be entered into Riverside.
Once the Stream URL and the Stream Key are copied into Riverside, you are ready to start streaming.
The stream will now initiate once the recording button has been selected in your studio.