On top of just the skill and experience components to being a successful online coach, this side business idea is all about building a community around the help you're offering and fostering trust with members. Plus, your community members will learn from each other along the way. Creating the space for that community can be as simple as setting up a private Facebook group or choosing a community-building platform like Ning.com that has even more capabilities like using your own custom URL, having internal forums, customized designs, and more.
As for the questions an Amazon recruiter might ask, Bezos himself offered guidance for hiring standards 20 years ago in his 1998 letter to shareholders. He encouraged decision makers to think about three guiding questions: "Will you admire this person? Will this person raise the average level of effectiveness of the group they're entering? Along what dimension might this person be a superstar?"
As for other tips, all I can say is “a penny saved is a penny earned”. If you are running out of ideas to make money, start saving. Some quick “low hanging fruit” tips to save some quick cash include – switch to MetroPCS or Boost for cellphone (I only pay $20/month), switch auto insurance to Insurance Panda ($25/month), and start using GasBuddy (saves me like $100/month at least. I drive a lot).