I always hated high-school shows and high-school movies because they were always about the cool kids. It was always about dating and sex and all the popular kids and the good-looking kids. And the nerds were super-nerdy cartoons with tape on their glasses. I never saw 'my people' portrayed accurately.
There is no age height or weight requirement to skate. It is good exercise no matter what your age is. If you want to be competitive most start young. But I practice with many adult competitors.