Well, German is supposed to be one of the easier languages to learn for native English speakers because German and English have a lot of common linguistic ancestors. Many words in English came directly from German (Beer, Mouse, House...) and the grammar is pretty similar.
But not every language is going to appeal to everyone. Sure. I get that. Just realize that no matter what language you choose, the pronunciation is going to be different, the grammar is going to be different, even the way you think...is going to be different. That's one of the reasons learning new languages is so hard because you are literally rewiring your entire brain. Of course, it's ALSO why people who can speak even just a 2nd language have so many mental advantages over people who only learn 1 language.
So next question... what do you want to do with your language skills? Do you want to travel somewhere? That would make it obvious what language to learn.
Or are you looking at job opportunities? Right now, Chinese is quite popular due to all the business American companies are doing in China, as well as all the business Chinese companies are doing in America.
Maybe you should watch some youtube videos in different languages and pick out one that "sounds nice." Well, there are certainly worse criteria for choosing a language!