You were good at your job. That's why you're here. Somewhere along the way, someone decided that being excellent at the work meant you'd be good at leading the people who do it. Nobody handed you a kit bag on the way out of your old role and into this one.
This isn't a map with directions. Maps assume someone has already walked the exact route that you are going to take and knows precisely where it leads.
This is a packing list - the things worth carrying with you before you set off, plus a few things worth picking up along the way, gathered from years of watching brilliant specialists make this exact journey.