The assignment you have for class states that you need to use SCHOLARLY sources, mainly articles from journals.
What does Scholarly mean, though?
Before you get into the content of the article you found, let's judge it by the way it looks by comparing Popular and Scholarly articles.
It is important to remember the context in which you are doing your own research. The Popular Vs Scholarly comparison is not a Bad Vs Good comparison. Popular sources are not inherently "bad", and scholarly sources are not inherently "good".
When doing research, there are many occasions where it would be appropriate to use a "popular" or non-scholarly source. Scholarly articles present research about specific topics but you might need more background information or need to see what people's opinion are on the topic you are researching for class. Turning to Time Magazine, The Atlantic, or Salon.com would all be good options in those cases.
But when your assignment calls for scholarly sources, then you need to know what those look like in order to complete the assignment successfully.
This applies even when a grade is not on the line.
You look up information all the time on your phones and computers at home using Google. Knowing that information comes in different types can help you find credible information that answer your questions.