If you’ve got a trustworthy character and have worked on yourself to develop and enhance those traits, half of the “battle” to become an ace salesperson is already won!
I’m going out on a limb, and guessing that if you are a highly introverted person, your interest level in becoming an outstanding salesperson may not be at its pinnacle! It’s not that it’s not possible; it definitely is. It may be more intricate, because your natural “gift of gab” may seem distant or artificial.
For some people, the tendency or desire to initiate conversations with unknown persons is a given. If there is another person in the proximity, there are conversations to be made - period. For more introverted sorts, the tendency may be a bit more inward. “Gee, there’s a person. I wonder what they think of this humidity we are having. Nah, they are probably concerned with what’s on their grocery list for tonight’s dinner. I wonder what they would think if I made some general comment. They’d probably wonder about my sanity or wish that I’d mind my own business.”