You make money with ad revenue. Your first step is to create a YouTube account and start uploading videos. Then you enable monetization on your YouTube settings. Basically, this gives Google the go-ahead to include short AdSense ads with your videos, which you've seen if you’ve watched a YouTube video. When viewers click on those ads, you get paid.
The internet changes so fast that one year online equals about five years in the real world. But the principles of how to start and grow a successful online business haven't changed at all. If you're just starting a small business online, stick to this sequence. If you've been online awhile, do a quick review and see if there's a step you're neglecting, or never got around to doing in the first place. You can't go wrong with the basics.