I'm going to give you some advice that has worked for me all these years of my life. Talk. Just keep talking. Nervous about meeting a new person? Just talk more. A friend of mine pointed out this strategy of mine in junior high. She had come along with us on a beach vacation. We were at the pool at the condo and met some boys our age. Later that night she asked, "Do you know you talk a lot when you're nervous?"
Unsure about how your message will be received? Just talk louder. This especially comes in handy when you are speaking to a toddler. They don't have a very good command of the language yet, so if you speak more loudly, they certainly will respond better. The same goes when you are speaking to someone who doesn't speak English as their first language. Louder is always better to ensure that they understand what you are saying. Are you trying to make a point? Volume evokes confidence. Let those words fly, and add in a few extra words for good measure. Why get to the point when you can embellish?