The expression ‘fake it till you make it‘ is an invitation to do something you find difficult until you do it really well. And it means you have to repeat it time and time again so you master the concept or the action.
Some people are not in favour, Lisa Quast, who wrote the article Why you should stop trying to ‘fake it till you make it’. Some other people like doctor Amy Cuddy are well in favour:
What do you think?