Ambra, nothing here but good wishes for a successful outcome. You sound like you have your head in a good place, despite the stated and perfectly natural fear and anxiety of the unknown.

When that creeps into your awareness, tell yourself that focusing on that is counterproductive and does not help anything (which is the truth.) Then, choose a subject with pleasant associations, and focus on what is good about that.

It's a trick, but it works.

Good luck!