You can try reading through this thread as a starting point. Basically, what people recommend is either investing in photoshoots (for money) and promotions (for fans) before producing singles, or buying research points to unlock single producing without the need to hire staffers right off the bat. The important thing to keep in mind is that salaries and rent can add up pretty quickly, so avoid going onto the second floor like the plague, and try to stay on the first, rent-free floor for as long as you can. Don't forget that, in the early stages of the game, photoshoots can be a great source of income, and daily promotions are crucial for future sales (more fans on your group = more single sales).