What is my writting's problem?

Hi everyone! This is the first time I am here and similarly like what most of us here, I hope I can improve my english through this forum.
Here's a little paragraph of myself as introduction. I hope people here can help me to correct whatever grammatical errors and structuring of my language that I had in this thread. After reading through, I hope some kind souls here can give me an overall critique of what my main mistakes are which i often make and how I can improve on it. I would like to know what is the main problem of my writting.
Thanks a lot

Writting hasn't been easy for me. I tried many ways to improve my writting but I just can't get to the standard what some of my friends are. I felt that I have a lot of problems while writting. I was told that my structuring is my main problem. I wondered how should the correct structuring be because it doesn't seemed easy for me to differentiate a correct and wrong structuring of a sentence. I hope somebody could give me some tips on how I should improve on my eassy writtings. Thanks.

Million thanks!