Clickbank University (CBU) has some pretty good affiliate training, but not my #1 choice. I've been doing this stuff for almost a decade now. If you want to be an affiliate and build affiliate websites, then you are better off learning about that stuff from this affiliate training center. They've been around for 15 years, and have produced thousands of success stories (some of which I've personally mentored, since 2012).
Consider selling in lots. A lot is a collection of similar items that is sold in a group. For example, if you have a collection of books, magazines or similar pieces of jewelry, consider selling them all at once in a lot. You many not make as much money as you would have if you sold each item separately. However, the items will likely sell more quickly in a lot than they would individually.
Sadly, it has and still IS going on. When I finally decided to leave WA and not renew at the roughly $400 gold member membership price, WA changed the websites email holder to no longer for example to be firstname.lastname@example.org but to email@example.com. I have had several agencies contact the owners of WA to rectify this plan and I have even been emailed directly saying that they have “fixed the problem”.
With drop shipping, you’re effectively partnering with a manufacturer or wholesaler to sell their products. This way, you don’t pay upfront costs to buy inventory, aren’t sitting on unsold items taking up expensive warehouse space, and don’t have to deal with shipping the products yourself. You simply create your site, fill it with drop shippable products, and drive in customers, with almost everything else done for you.