The scientists we learn about in textbooks almost always come from wealthy backgrounds, as it gives them the opportunity to remove themselves from the mundanity of day to day life.
If I consider how I met my wife, I wouldn't call it luck, but rather circumstances that happened to align. Especially introverted people profit from letting sheer randomness take over and prove their assumptions/internal model wrong. It seems as if your world view shrinks when you don't challenge it. Just don't take big risks but make low cost engagements/attempts that build up into something big.
It's like keep going so you are there when the door opens, but also stand in particular places, so you can see what doors exist.