My business model is selling online courses, not affiliate marketing.
And as a course creator yourself, I don’t advise you pour your precious time and energy into building other people’s businesses for tiny percentages when you could be building your own.
However, there’s nothing wrong in allowing your audience to reward you a little for recommending stuff they might find useful.
So I occasionally use affiliate links. They’re links that if you click and later go on to buy that product, I get a little commission payment. You don’t pay any more than you would have anyway.
Two things you need to know:
One: I’m strictly only ever an affiliate for stuff I personally own, and love, and use regularly.
Two: I’ll always do my best to flag up the fact that a link is an affiliate link.