It could also apply to your first notebook entry on italki!

Hi! I'm Jason in New York, USA. If you need help with spoken English, I am happy to help you. I also like to just make new friends all over the world. If you want, add me to QQ: 1990992857 or ooVoo: 6214337481 Thanks and take care! --- Jason

It means to try something, usually for the first time. It's like saying, you brace yourself and jump right in - usually you're trying something new/scary you're nervous about, like skydiving.