Didn't you also think it had to look perfect before realizing simple works better?

Could just be the placebo effect.

What if beginner's luck is just the brain not knowing what to worry about yet? You sit down at a poker table for the first time and play wild cards you'd never try later, and it works. Or you pick up a new video game and beat a hard level by accident because you didn't overthink it. The warranty runs out the second you learn the rules and start seeing all the ways you could lose.