You must become a strong salesperson if you want your business to become successful. You are going to have to “sell” your business not only to customers, but also to prospective investors and even to potential employees.
You must practice. You must refine your pitch. You must get feedback. You must be extroverted. You need to show confidence. You must be positive. You must be trustworthy. You must follow up. You must listen.
Or at least, get someone who is.