Please see my direct comments below. Do let me know if you have any further questions. You will see my annotations in bold, ALL CAPS, quotation marks and asterisks (*). If you check this on your phone, sometimes "bold" will not show up, so please compare your original message to the updated one. Thank you.

The Covid-19 status in Turkey is severe these days.
I heard there were about 5 million cases and about 40 thousand people died in Turkey.
THE Turkish government went into full lockdown in May. (The sentence as it is correct and proper, yes; however, I think the order and relevancy of your sentences could improve. Honestly, the third sentence seems out of place because there is no connection to anything from what I'm reading here. Unfortunately, I cannot catch everything when listening, so my apologies for not saying this earlier. My suggestion would be, for example: "I heard that the COVID-19 status/situation in Turkey is severe these days which led it to go into full lockdown *this month. There have been about 5 million cases and about 40,000 deaths in Turkey alone."

*If your interview is in May, I would say "this month" because to say "May" sounds strange when you are talking about the present. If your interview is in early June, I wouId say "last month." I would misunderstand you for a moment or have to question if you meant May 2020 or May of this year. 
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I have a question about 3rd sentence.
“went into full lockdown” is right?
Or “take action full lockdown” is proper?
Or What sentence is more proper?