English article : a and the, or no article

In my opinion, the biggest difference between English and Japanese is that we don't have any articles in our sentences. We don't have any concept of them (articles - plural). I've been curious to know how natives learn how to use them. I kind of understand the concept or definition now. But I still make a lot of mistakes easily x)
Let me ask you, how did you learn how to use them?
Thank you.

Your written English is good.  I grew up in Canada, a country where English is spoken fluently every day.  When a person is surrounded by their culture and language, then he or she assimilates the use of grammar and sentence structure.  In other words, it's like breathing air... you just do it.  Since I have been utilizing the italki site, I have revisited the reading of information on English grammar both spoken and written simply for my own interest.  I took some English literature courses in university and, as such, I still have a good knowledge of the language.  I have been reminded of how amazing it is to speak my mother tongue so easily; however, the rules of structure, syntax, grammar and speech are so complex when you study them.  That is why children learn so quickly; they just speak it.  When we are adults we often apply adult logic to learning another language and then we overthink what we want to say.  We also think in our native language and then try to translate into the second language instead of thinking in the language that we are learning.  It's very interesting...