Start a blog. From day 1, explain that you know nothing about (your new topic, such as cooking) but you’re on a quest to learn (a specific outcome or goal, like how to make the world’s best pancakes) and invite the reader to make the journey with you.
Now start reading about your topic. A lot. Buy and use the products in your niche. Write about what you learn, and tell about your experience with the products. Recommend the good ones.
Once you’ve got a dozen or more blogposts, start asking experts in the niche for interviews. If you’re too shy or nervous at first, you can start with email interviews and work your way up to audio interviews.
You become the researcher / reporter, and you let the experts handle the heaving lifting.
In 1-5 years? Now YOU’RE the expert. And you never had to lie about knowing stuff you didn’t know when you got started.
In fact, you got to be honest, truthful and yourself the entire time. And you’ve built a tremendous rapport with your audience who very much feel you’re just like them.
When you use this formula, your readers will trust you and they’ll act on your advice, whether that’s to buy an affiliate product you recommend, buy your own products or eventually let you coach them.