Here are the Frequently asked question: https://rumblefaq.groovehq.com/help
Here are some rules and guidelines: https://rumble.com/s/terms
What you can do to get more views is to upload or add your video to Youtube, Facebook (link to the video on Rumble) , Tumblr, Ello, etc
If Your video is accepted for full distribution Rumble will distribute and monotize it on platforms as Aol, Yahoo, MSN, Youtube Rumble Viral and maybe some more. Also have a look at other peoples videos that doing well. Maybe that helps you what will work an what won't work.
Wish you a lot of succes!