It’s ok to admit you have no idea what you’re doing. In fact, it’s probably a good thing.
I remember when I first started in advertising. For the first few weeks, I was waiting for the handbook which told me how to do my job. And then I realized it didn’t exist. It definitely didn’t exist. Charlie O’Donnell, a partner at Brooklyn Bridge Ventures, writes about how admitting you have no idea is actually OK - and what to do about it.