Hi Julianna - my advice: own it. Be a listener and a learner, but make sure it’s clear you’re not there to hang back, or listen to any bloviating while you wait to get a word in edgewise. Speak up and ask questions. Don’t be afraid to look “green”. Be confident in your intelligence (what you brought to the industry and what you’re developing), and how well you do your job. Don’t be afraid to show it. You can do all these things and still behave as a perfectly pleasant human being with a good sense of humor.
Definitely find a female mentor in your field. It may be someone whose style is not at all like yours, but is someone who models behaviors that help you identify the best version of those behaviors in yourself. Also, be faithful about continued professional development. Not only will you keep your general professional skills sharp, it’s a great way to connect with other women executives outside your company or immediate industry.