The most important thing of being a successful marketer is knowing your products well. If you are new in the business, you should learn about the basic things about your products, and learn more later for the whole package very soon.
Your customers may give you consideration about being new in the business but how long they will give you their kindness until you can master the whole package of your products ? They can not wait and most of customers are impatient persons, they want the best people to handle them, not a newbie or amateur, they need a professional one. They want someone that can give them answers about the product fast, or give them the solution about it. They may tolerate if you need to ask other persons in the business for something that you do not know or you are not sure about it. But it can make your position incompetence to the customers.
How do you master the whole package of your products ?