What is your step-by-step plan for someone starting a business on Lovable today?

Start with a problem from your own life or from someone you are close to. Find an idea for how to solve it. Go find a small number of people who are willing to pay for your solution and when they actually pay, that is your first real signal. Then make sure they keep coming back, that it was not just initial excitement. When you have gone through those steps, you have an early form of product market fit. Then the question becomes: who are more customers like these customers, where do they go to find new products, and what is unique about your story that will make them care? Answer those questions and you have the beginning of a real business.