Depends how aggressive you want to be with it but I would spilt it up into 5 bits then pick 2 coins from the top 25, another 2 from the top 25-200, and then one coin outside that for a pure gamble. That way you diversify and at the same time are in some solid coins too.
I like this answer. Splitting it means you also divide the risk as well as divide the profit. But it is safer for a beginner to do so.
The after learning some time and get a grip of it you might use bigger amount and smaller split
Investing in ethereum also I think is still the best with safe and good potential