Hello. I am not pretty sure to ask this question in this community, but I really want to discuss it and need help with it. I am a new seller on amazon and there are many agencies in the USA that offer account management services. But as a newbie I am not sure whether to book an agency for my amazon account management to drive sales or I should manage it myself with basic information. I'm sure it will take some time, but can anyone suggest a proper solution for that? If I work on plan B (research phase). How much time it will take to get good results?