Excellent point Vikki. When starting out, it's
very unlikely you'll have enough paid projects to saturate your available time. I believe it is better to use that extra time on early projects anyways to learn and perfect your technique and workflow. It would not be reasonable to charge the customer for that extra time and effort - your reward will be the experience gained.
Better to charge a price that's competitive with the going rate in your area, and not be concerned at this point with how much you're making per hour. By doing so, your early customers will likely get a better result which may very well translate into further business down the road.
Hopefully, by the time your business grows and the projects pile up

, the efficiency from your experience will help you achieve the desired hourly income rate.
- Kurt