The gold standard job transition book for “leadership roles” is the First 90 Days [1]. I re-read it every time I change roles. The #1 mistake people make is try to apply the lessons of their last job and and propose big changes without having built up sufficient context, relationships and credibility. Stay curious longer, meet a lot of people and hear out what their concerns are, and find quick wins. Invest in developing relationships by finding common ground and spending more time with those that you naturally hit it off with.
[1]https://www.amazon.com/First-90-Days-Strategies-Expanded/dp/...