I posted a version of this list of do’s and don’ts when I started my last job in finance, and it helped me navigate the first few weeks in my new group and office. I highly recommend printing out and studying your new company’s organizational chart and slowly reaching out to everyone on there (especially those above you) to figure out who you can help right away. Never leave for the day without asking your teammates how you can help and what you can do to add value. This small gesture does wonders for how others perceive you, and I promise it won’t lead to additional, unnecessary work–most people won’t take advantage of you but they will appreciate you asked.