well, go on YouTube and search how to start affiliate marketing, i think that would be the thing you're looking for, affiliate marketing isn't easy, so make sure you take that into consideration, i have tried affiliate marketing and i will say i never liked it one bit reason is because it turned out to be very very difficult.
i wen on click bank i never got a sale, i went on warrior plus i never got a sale, i will also get traffic, i will get clicks but not sales i always wondered of i was doing it wrong or something.
i never actually took a course or anything just YouTube videos here and there hoping, not to make it impossible people are doing this and earn alot