I do not know english , can I become hindi news ankar or I have to be fluent in both hindi and english language???
In today's corporate world you must have to learn english to become an anchor as the job is all about presentation and is not a job you can get as soon as you graduate. You have to start from low and if you don't have command over english then you might not be able to get many opportunities. Most of the hindi anchors today are well versed in English and have started working as a ground reporter, intern, etc.
I suggest you must try to learn english if you aspire to be a journalist.
English plays a vital role in everyone's life. You can become a Hindi anchor, but you should be even good with English. Even if you are not good enough with English fluency that's fine, but you must be bit good with English. You can learn English by reading news papers, watching English movies and listening song's. It's simple, as the lockdown is still continuing, you have enough enough to learn, so daily improve lill bit.