If you have already found that your customers are first timers, i can tell you one thing

Guide them step by step

With the problems. For example, for marketing, outline the process for Facebook marketing and ease it in their accounts. If you see they have problems with lets say accounting, integrate Freshbooks.

Your customers will be profitable when they put effort, and for that to happen, they need to know what they are doing and connect actions to results.

My 2c