God's plan for enlarging His kingdom is so simple - one person telling another about the Savior. Yet we're busy and full of excuses. Just remember someone's eternal destiny is at stake. The joy you'll have when you meet that person in heaven will far exceed any discomfort you felt in sharing the gospel.
I was lucky enough to be the lady that was asked to be Maria in the Sound Of Music and that film was fortunate enough to be huge hit. The same with Mary Poppins. I got terribly lucky in that respect.