There are not many things you are asked to do when you lead other people.
Certainly, making sure your team has the needed support. Financial, political, and technical support. Also, truly listening to and caring for your team members, including helping them find a career trajectory they are comfortable with. Finally, taking difficult decisions when things stall or risk to stall, possibly with the aid of a transparent and candid process everyone in the team understands and trusts.
And then, of course, there’s everything you say you’ll do. This is as important as the three points above, as it sets the tone for the type of relationship you are going to build with your people. If you start not delivering on things you yourself have taken ownership for, even worst if you are not open and don’t explain when that happens, why that happened, then the relationship is going to be weak and feeble. And it will be very difficult to turn that around.
Good thing is, you choose what you promise. Choose mindfully.