​ I built my first SaaS back in 2023. Spent months coding. Launched to crickets. Zero users. Zero revenue. Just a lot of regret. I made every beginner mistake you can make. But I learned a ton from it and now I help other founders avoid the same traps. Here are the biggest lessons that changed how I build now. Lesson 1: Solve a problem you actually understand I built a tool for real estate agents. I had never sold a house in my life. I thought I understood their problems. I ...