I recently went in for the same procedure (2 weeks ago) so I know it can be a bit scary. And it’s OK to be anxious.
But remember that this procedure is commonplace these days.
You will go in, the team will be very nice, they will prep you for the procedure. You will be very comfortable and relaxed (anesthesia induced).
You may even be awake during the process and able to watch it on the monitor. Which I hear is an incredible experience. I was not, I was knocked out.
Trust the process. You will be fine and live a fuller, more confident life moving forward.