Before choosing a product, check out the sales page. Is it something you can read? Is it well written and has a good design? There are a lot of sales pages that are junk so that sales are bad even if the product is good and maybe have to cut weeds before finding something worth promoting. And, of course, be sure that the product produces recurring commissions. In clickbank, the Affiliate Programs That Pay huge commission as per their commitment.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.