I was NOT a born salesperson but am living proof that sales is a learned skill.
I was the shyest most introverted geek, starting life as a female tech pioneer who was forced to learn how to sell at IBM. I endured an intensive two-week residential sales course that I barely squeaked through but I made $150,000 in my first year in sales when I was 25. After attending the ultimate IBM 100% sales club achievement awards, I decided that there had to be more to life than climbing the corporate ladder.
So I left IBM, my hometown and all my friends and family for a year of solo travel in Europe, finally returning 9 years later after working at 5 startups in Europe.