Is there a quick way to see where someone is on the leaderboard please ?

Not really. In fact, I think since they removed the statistic in our profiles (I know I can see this if I view my profile on a question I've answered) to say how many points everyone has earnt in a week, that it is actually harder to find yourself. The way the profiles used to be, I could see that if I had say, 20,000 points on a Monday, and I had earnt 40 points for the week after the leaderboard had been updated, I should have at least 19,960 points on the leaderboard. Then I would be able to go through the pages until I found myself.

The leaderboard lists the top 5,000 users. This week, users needed a minimum of 4,731 points to be on the leaderboard (see link). Therefore, there is no one listed on the leaderboard on level 3 or below, so you, as a level 1 user, won't be able to find yourself listed there. The number of points required to be on the leaderboard increases every week, and it will probably only be a number of weeks before there is no one listed on the leaderboard beneath level 5.