Well, it looks like you already did it - you have a Meetings tab showing in your screencap so you don't need to create one now (and you can't). It's already there. Are you trying to redo the steps due to a problem later on? That doesn't really work - you can't just start over. You would have to undo everything, step-by-step, from where you stopped which is basically impossible. Better to just solve the problem you ran into right there where you were. If that's the case, what was the problem you were seeing that made you want to restart?
Well, it looks like you already did it - you have a Meetings tab showing in your screencap so you don't need to create one now (and you can't). It's already there. Are you trying to redo the steps due to a problem later on? That doesn't really work - you can't just start over. You would have to undo everything, step-by-step, from where you stopped which is basically impossible. Better to just solve the problem you ran into right there where you were. If that's the case, what was the problem you were seeing that made you want to restart?