If you don't know what to do, my advice is to don't do anything. And I mean it. The idea is that it's you who has to do the reading and don't rely on random people over the internet.
Also if you want to invest, keep in mind that you should use money you afford to lose or to keep locked for years.

This being said, the answer should be Bitcoin.
The reason is the Dogecoin, hyped or not, is a cryptocurrency with infinite supply. 14.4M Dogecoins are mined every day, and this number won't change.
Since Bitcoin is fixed supply, with the rise of the demand there's better chance for the price to keep growing, as average, over time.