10 ways to fake it till you make it

You can't fake it if you don't say yes to opportunities. Don't let yourself be the person to say no to opportunities, let others do it for you and you'll be happily surprised.

If you're in a meeting where you're the dumbest person in the room, listen and learn quickly.

Find someone that knows what you need to do and how to do it. Ask them lots of questions.

If there are documents related to your new job, role or project, absorb as much as you can.

When I manage new projects and I don't fully understand the topic, I'll read books on the subject. At the very least, I'll learn a bit more about the project.

If you're working with a team, leverage their expertise as much as possible.

See if you can steal ideas from other similar areas. If you're trying to manage a specific type of project, take a look at how others have managed those type of projects and steal (adapt) the plan for your use.

If all else fails, ask for help from your boss. Ask if there are specific resources that you can use to help.