Set Myself Up for Success

I work at a Fortune 100 company. Currently I have been offered a higher title and more money within another area of the same firm. The conversation started as a lateral move and even up in them a higher role (equivalent to my current boss). I was not prepared for the higher title and offer. My initial thought was “what is wrong with these people?! I am not prepared for this! This is a grown-up role!” I have since told myself that somehow the new hiring manager saw some value in me. Now I am trying to understand how I can prepare myself to do the best at this new role (likely start in 3 weeks), level up to this executive role (executive role means different behaviors) and set my new team for success. What is the thinking, principles, networking, work areas , inherent skills that are needed for this new role? Help!