yes
14
14
yes
Yes it's fine if you go out with a 14 year old girl because it's not that big an age difference. A twelve year old can pass for 14 if they look their age, and you say you look alot older than 12, so you should be fine.
Yes, but only for a short while. If other relatives aren't there then it's okay. You should find other relatives to go to if your parents aren't there.
Yes but don't touch it
Huge
You should look for someone older, not younger or closer than age. There's a lot of maturing in those 3 years that a 14 year old will not have.
By then it will start to look like a woman's
Well my brother started when he was like 14-15. So most likely 14-15.
Absolutely not, karyotype is not affected by age. The spread of a 14 yr old's chromosomal DNA will look exactly the same as a 60 yr old's to the naked eye unless certain diseases are present.