Hi! May I try to correct you?:)

It's my first article on this website.

Hello.
It's my first article on this website. I began learning English 3 month ago. It turned the difficult task. (I believe that you mean: It is a difficult task to learn English?) At first I was been (I have been) looking for a partner to exchange languages, but when I found his (when i met someone) I understood that It's incredibly difficult to talk in life. All life I learn anything new. (All my life I learn new things) It's difficult too. Through this experience, I don't think stop there. (I won't give up)

Life looks how a river with bends and turns where knowledge is the water. If we don't give water the river it will dry. This is understood everybody here.

(Life is like a river and knowledge is the water, without water, the river will dry)

There are many ways to correct your sentences. This is just my opinion. Keep writing and don't be shy of mistakes, we should be brave to add water to the river ;)