Hello! It all depends on how much time and effort you are willing to put on the field. I have been writing articles for the last 10 years and I managed to buy a car, pay Bills and pay for university. I will not say that you will get rich, plus now things are very different from what they were ten years ago.
In the last 3 years, the value of articles has decreased, however, if you get a couple good clients you will always have work coming. Usually, 500 words of content are Worth 5 dollars....I write in English and in Portuguese... I also write stories and proofread/translate. Finding People that will pay you 30 USD per article happens once in a lifetime...you will usually work with agencies that were outsourced to write. You get cash on the amount you write...you can find plenty of work at upwork, for example, but don't accept jobs that pay less than 3 dollars per article...also don't expect to get paid 10-30 an article cuz that is just not realistic