I feel like this is more common than we're led to believe
Among my friends, all late 20s early 30s, about 9 of them conceived first month and 3 others month 2 after saying they think they hadn't time their ovulation dates right. So, accounting for the ovulation dating mistake, it's really still the first 'proper' try.
My best friend also just fell pregnant first month. She feels unprepared, said she was expecting it to take 6 months or so, as that's what lots of relatives told her, so she started trying earlier to account for that.
It can be deflating if you're the only one that's been trying for a while!