Building a startup is an all-consuming journey—one that requires deep financial knowledge, resilience in fundraising, empathy in leadership, strong sales skills, and a keen eye for hiring. Looking back, there are five things I wish I had known before launching my first company. From understanding cash flow and investor expectations to mastering the art of sales and team-building, these lessons could have saved me time, money, and stress. The early days demand total commitment, often at the cost of work-life balance, but that obsession is what it takes to succeed. If you're embarking on your own founder journey, these insights might just help you navigate the challenges ahead.