Nicholls's rating of 86.75 on the first day of the 2014 Winter Olympic Games saw him finish in fourth spot in his heat and earn automatic qualification for the weekend's medal event.
Following his relatively comfortable showing, Nicholls told TeamGB.com: "I just went for it. The standard is crazy. To be able to go up there and do a run that I have never done in my life shows the standard is pretty high.
"I feel amazing. I can't explain it. I came here and all I wanted to do was land a run and landing a run and getting to the finals is a dream come true.
"I am just going to go up there again in the final and try my best. I am just happy to have made it. "
The 20-year-old is competing in his first Olympic Games.