Want expertise in something… take a week and learn all you can about a topic, then put together your training summarizing what you learned.
If you wanted to put together a real estate course you could do it in a week if you TRULY wanted to. Couldn’t you pick ONE tiny small section or sub-sub category of real estate, spend the next 7 days devouring just that subject.
I mean watching videos, reading books, researching online or even getting other products on the subject.. until you learn that subject inside and out? If you did that you would already be ahead of 75% of your market. You don’t need to be the expert. You just need to know more than the audience you are presenting to.
You don’t have to be the expert, just research to know more than your audience. And they will love you for it.