Hi Naresh,

There's no age limit on becoming a professional writer of any kind.

As for the companies concerned each company have different age criteria, some prefer young minds while some require experienced personel.

The most important part is even if you cant get into companies you can work as free lance content writer.

Some companies which provide freelance content writing opportunities are as follows

• CreedOn
• ZS
• Cactus Communications
• Aglasem
• Collegedunia
• Shiksha and many more.....

I request you to go through the link below for more information

https://www.careers360.com/careers/content-writer

Hope that helps you