It's not an easy task to start a business, and starting from scratch is even more difficult. In such a situation, you must have significant advantages in other areas. For example, having extensive social connections, or having certain financing capabilities, business information, and sales channels, etc. Moreover, not everyone is suited to start a business from scratch; it depends on one's personal actual situation.
For entrepreneurs who start from scratch, methods and skills may vary, but the requirements for abilities and qualities are usually consistent.