That’s peanuts! Congrats for realizing it early
From mine, all I remember was getting the impression that putting money in particular stocks without knowing what you're doing is a bad idea. Pretty valuable lesson, I guess, as I've never bought individual stocks since then...
Therefore ETFs that track that - eg $XLG is the s&p top 50. Unsurprisingly, consistently beats the s&p500. Same for $QQQ - in this case the skew is for more tech stocks (which were the best asset class in a decade)