Проверьте пожалуйста:)

It is true that young people now have more freedom than their parents. In today's teenagers have a huge selection of clothing, style, way of life. They have no such serious problems as adults. Teens enjoy life.

It's true that young people have more freedom than their parents now (чаще всего в конце ставится). In today's (можно так же nowadays - в наши дни) teenagers have a huge selection of clothing, style, way of life. They have no such serious problems as adults. Teens enjoy life.

А так в общем все правильно.