I can't screenshot on my IPhone 6?

I got my iPhone6 in Mid Feburary this year, all of a sudden today, I can't save or screenshot anything (I've restarted, didn't work) and also please don't ask stupid simple questions, like, "how to screenshot".

Iphone alarm isn't coming through headphones?

I go to sleep with my headphones in and i set my alarm, but when it goes off the alarm goes off for a split second through the speakers then it goes to my headphones which i don't want, i want it to come out of my speakers. How do i change this?

Is it alright if I didn't fully charge my iPhone 6s for the first time? - 1

Is it alright if I didn't fully charge my iPhone 6s for the first time? - 2

Added (1). I Just bought my new iphone 6s, the salesman told me to fully charge my phone, not 8 hours, but fully charge after it drops 20%. Unfortunately I plugged in my phones to my laptop to restore backup then the phone charged until 40% and i unplugged it. After the battery drop to 20% and I fully charged it. Is it going to affect anything?

Is it alright if I didn't fully charge my iPhone 6s for the first time?

Is it alright if I didn't fully charge my iPhone 6s for the first time? - 2

Added (1). I Just bought my new iphone 6s, the salesman told me to fully charge my phone, not 8 hours, but fully charge after it drops 20%. Unfortunately I plugged in my phones to my laptop to restore backup then the phone charged until 40% and i unplugged it. After the battery drop to 20% and I fully charged it. Is it going to affect anythin

Fisheye effect on musically?

Ok, so I'm dying to make a musically with the fisheye effect. I'm 13 and my parents refuse to buy me the actual fisheye lens that attaches to your phone b/c they're scared I'll loose it and I probably would. Also, my phone is extremely shattered so if it is anything homemade you suggest please make sure my glass on my iphone won't come off. I'm looking for apps that can open my photos and put a fisheye on a video or like some kind of homemade thing.