I'm a 14 yr old boy with no armpit hair. I know I have hit puberty, as I have a decent amount of pubic hair and a 5-5.5 inch penis. I'm just curious to when I will get armpit hair, my brother got some when he was 9. And my voice also hasn't really showed any signs of breaking.
Many guys don't get armpit hair until around 16 or so. It can happen at any time during puberty.
Don't compare yourself to your borther. We all develop at different rates/times.
Same with the voice. Give it time.
You are NORMAL.