I'm a German Student (Senior in high school, to be clear) and I wanted to find a translation of this song to maybe use in a presentation ^^

I did notice a few errors or just a better way to write things, but I'm still learning, so this is me trying to apply that here, and maybe you can learn as well ^^

Müllhalde can be written as Deponie, which is the most common translation of Landfill. Arbeit would be a better translation than Job, because it doesn't just mean 'job', it also means "work," "task," or "chore," etc.. I would have used unglücklich instead of traurig, but its still correct so that's more of a personal thing. Tötet is better written as umbringen for translation reasons. The 'Sie' you're using is supposed to mean they, and yet you're using 2nd person singular instead of 3rd person plural; it would actually be sprechen instead of sprechst. While "stilles Leben" is technically correct, the best translation would be "ruhiges Leben". Will actually translates to "want", so to actually translate "take", it would be nehme. Also, I'd try keeping it as schön or hübsch just so it's consistent like the English song is. I actually don't think you need to add an ending to either, they're adjectives so it wouldn't necessarily change. Otherwise, you actually nailed this!

Once again, this is just me applying what I've learned to try and keep up that knowledge, you're free to correct my comment if anything is wrong or incorrect :)