What is the best thing to do to learn proper grammar?

Your grammar isn't that bad... What article writing sites have you done? I use one where your writing doesn't even have to be that good for submission. PM me if interested.

U can read many books and also join for the online classes.. it will surely help you.. all the best..

I'd have to say, get exposed to the target language (the language you want to learn) as much as you can. That is why many people recommend reading books. It doesn't actually matter what book you read as long as it is a good specimen of the language and you're interested in it. By good specimen I mean it has good English. Regarding exposing yourself to English, I would recommend watching movies and many TV series too. I am not a native speaker of English, although it is considered one of the languages of our country, and I learned to speak English when I was a child from Cartoon Network. lol. My Dad and Mom then always had to go to work, being teachers, and I was left at home with the TV and my aunt. So to cut it short, By watching, I learned to speak. Nowadays I like shows like CSI, NCIS, Bones, Madmen, etc. They are to me, genuine specimens of the language and that for me is a way I expose myself to the language more and more and learn a lot of utterances native speakers would say. I also learn about the culture of these speakers by watching these shows. That, to me, is very important since I believe that you will gain a lot of insight and learn more of what native speakers mean if you learn their culture since I believe language is culture bound. You just have to be very observant of those things in the shows and also in books you read. You should discern even the minutest things you could learn from and always have the drive to keep on learning.

I'd have to say, get exposed to the target language (the language you want to learn) as much as you can. That is why many people recommend reading books. It doesn't actually matter what book you read as long as it is a good specimen of the language and you're interested in it. By good specimen I mean it has good English. Regarding exposing yourself to English, I would recommend watching movies and TV many series too. I am not a native speaker of English, although it is considered one of the languages of our country, and I learned to speak English when I was a child from Cartoon Network. lol. My Dad and Mom then always had to go to work, being teachers, and I was left at home with the TV and my aunt. So to cut it short, By watching, I learned to speak. Nowadays I like shows like CSI, NCIS, Bones, Madmen, etc. They are to me, genuine specimens of the language and that for me is a way I expose myself to the language more and more and learn a lot of utterances native speakers would say. I also learn about the culture of these speakers by watching these shows. That, to me, is very important since I believe that you will gain a lot of insight and learn more of what native speakers mean if you learn their culture since I believe language is culture bound. You just have to be very observant of those things in the shows and also in books you read. You should discern even the minutest things you could learn from and always have the drive to keep on learning.