Joining a new team

In the next couple weeks I’m joining a new-to-me UX team as a Staff UX Writer. All my roles thus far have been the product of taking on new responsibilities and stretch work around the same org structure and people. I have the chance to make a first impression and set the right tone in a new org for the first time in ~6 years. What advice do you have? What has worked and not worked? Would love a range of perspectives.