Affiliate Marketing Secrets

In order to join an affiliate program with products or companies I like, I need a website and company name. I have just got a domain name and registered with a hosting site and I am looking into building my site. However, I am unsure of how to create a site or sites for affiliate marketing, because I don’t know what it ought to consist of. If for example it was a natural health product, could I only write an article about it with a picture and then join its affiliate program, or is there more to it than that? What sort of a site do you need to join an affiliate program? Thanks.

I want to start an inbound call center selling some kind of all natural health product. I’m wondering if anyone knows where I could find a product to sell, call center software, leads, and anything else you could think of. I’m currently an agent with a couple years experience and I’m ready to run my own show. Also I was wondering if anyone knows how to become affiliated with a club company.
Any help is appreciated.