Turning on pseudo-extraversion might feel out of character but connecting with others does not mean you are out of step with who you are and your values. Advancing your ideas in a meaningful way by stretching to connect with other human beings is an offering to share what you find valuable. Remember that selling is actually a conversation, a fact that the loud, annoying salesperson stereotype drowns out.
I couldn’t present my way out of a wet paper bag in college, and yet I went on to compete in a couple provincial competitions.
What worked for me was faking it: It’s not public speaking; it’s interactive performance. I’m not reciting a planned script; I’m sharing key points in my own words.