@ossobuco,
I've used a principal derived from my own youthful fears to deal with things like that. No matter what you are undertaking there are some who can do it better than you, and some who can't, but in challenges that are truly daunting it can be good to focus on some who has done it, no matter how well or badly. Focus on him or her and recite the Jackass mantra .. "If that jackass ______ can do this, then so can I".
My first night carrier landing was such an experience. Worse I had the bad luck of being assigned to the phase 2 group which boarded the carrier in Pensacola for the trip out into the Gulf, while the phase 1 guys got to takeoff the next day from Pensacola at twilight and gradually adapt to the darkness over the sea on the flight out to the ship for their qualifying ten landings. When my counterpart finished his ten traps and nine cat shots, he taxied up to the island, where, in the very dim red lights around the island, he exited and I climbed in the cockpit. "Piece of cake, but it's dark out there" Tom Anderson said exultantly as I climbed in and strapped into the ejection seat.
Moments later the flight deck directors signaled to unchain my aircraft and taxi me up to the bow catapult. As I left the dim red glow around the island and headed up to the bow I was suddenly enveloped in an impenetrable darkness - no moon, no starlight, no horizon ahead, nothing - just darkness. The little voice inside said "I can't do this" "There must be something wrong with this aircraft" I'll down it and try another day". ... "No they'll think I'm a wuss: better to die". By then I was being hooked up to the catapult and the signal for full power was given. The automatic responses of training took over: I advanced the throttle and cycled the flight controls, Petrified I said to myself if that jackass Anderson can do this then so can I ! Then the moment of truth, one flicks the switch on the throttle to turn on the aircraft lights - the signal that your'e ready. BAM !!! the catapult fires and you're hurled into the darkness. A few seconds later, with the landing gear up, and the aircraft accelerating and climbing up thru 500 feet, the same little voice within was exultantly saying "What a cool, studly son of a bitch you are ."
Two lessons. 1. The little voice lies. 2. If that jackass can do it then so can you.