Why must making this money happen here, on this website? Why is that your requirement?

Too often people confuse the idea that the only way to earn bitcoin is to do something on a bitcoin forum. That's totally false and a slow way to get your hands on some BTC. You need to figure out how you can make your $20-40 in the shortest amount of time or effort in your world. Then use that money to buy Bitcoin or Litecoin or whatever. If that fastest way is on this site, great, but don't limit yourself.