As a course developer and promoter, I can say that on the face of of it, promoting can be easier than developing one. The upside of development though, is that once it’s done, have to do is keep it updated and it can earn you money for years. That’s the case with my SEO copywriter training course, which I’ve been teaching (and earning from) since 2009.
Google Adwords can be used to drive targeted traffic to a sales page. You simply make an ad in your adwords account then use your affiliate link in the target page URL of the ad. Obviously, you will have to continuously measure the conversions and see if the campaign cost is less than the campaign profit in order to keep the campaign running but I am sure you get the idea.
Actually Nunya, Jafar’s English is very good, with only a few very minor errors, and far better than most English speakers. It is simply not true that you can “barely read it”, it’s as good as yours. Most Americans, Australians and British I see online have very poor spelling and grammar, and use memorized abbreviations and SMS-speak instead wherever possible. You cannot sound as if you have something to teach people, if it sounds as if you still have to learn basic literacy yourself!
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ads will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.