iPhone 6 not charging, turning on, or responding in any way

I was digging through a pile of old(ish) electronics that one of my friends has, and I came across a iPhone 6, so I took it, and decided, well, I could use this as my phone (my current phone sucks) and when I went to charge it, nothing. I plugged it into my computer, still nothing. the screen is cracked, so clearly they dropped it once, and in one part, the screen looks a little warped, and bent ever so slightly at the edges (top left corner). I am not sure what to do next. Should I just bite the bullet and go get it repaired at a actual repair shop? Does anyone know how to fix it? Can it even be fixed? I have no idea.