Once the course launches, they are ready with their wallets. The course is priced at $100 (probably undercharging here, but it’s your first course and you are nervous) so some of them balk at buying it, but 100 people do end up buying it and you make $10,000 (minus processing fees). That’s the same amount you made from your advertising and you are in control of everything! Even better you don’t have to wait 30-60 days to get paid.
Once you setup your account on AdSense you will be given a code to add to your blog. This code will automatically display advertisements on your blog from companies who are part of Google’s advertising network. You may see ads from small companies related to your topic, or you may see ads from large companies that are completely unrelated to your topic.