The 23-year-old also played a full 80 minutes in Edinburgh's last outing - a 31-25 win against Ospreys - prompting Scotland head coach Scott Johnson to thrust him into the mix against Wales.
His dream debut quickly soured however as, down to 14 men, Scotland were quickly overwhelmed and fell to a 51-3 defeat.
But Fife insists the result did not ruin a momentous day and is eager to keep impressing for Edinburgh as the RaboDirect PRO12 season enters its final straight.
"I've dreamed about my first cap for so long but that wasn't what I had in mind," said Fife.
"It was never going to be an easy match but it got so much tougher once (Stuart) Hoggy got the red card.
"I had to slot in at 15 at times to cover but it is hard enough to play against the Welsh with a full compliment, never mind when you are a man down.
"It felt like I had been chucked in at the deep end - but in a way I did enjoy it.
"It didn't go well but I'm hungry to win more caps and make up for that defeat.
"We've got the World Cup next year and the summer tour coming up, so we don't have time to feel sorry for ourselves."