I'm a 16 year old in the USA, and I have to wait about another 6 years until I can start a theatre career.
In my area, there are not many theatre-specializing vocational high schools (as I thin is the case almost everywhere). Here most actors go to college after high school (which ends at 18, no extra add on years) because there are not many vocational schools for teenagers in the arts readily available in every area of it.
How to properly use its/it's:
Its is the possessive. It's is the contraction for it is...