The phrase "Silence is Golden" wasn't coined for nothing! This coming from an incredibly vocal person too. I'm learning that while I love sharing ideas and opinions, sometimes listening is the best to learn and accomplish work.
I try to be like a sponge these days in the workplace. There is so much for a young professional to learn, and I'd rather listen and learn than learn the hard way by opening my mouth and talking about something I have no experience with.