HI!! I wanna help -> Hi!! I want help.

I'm learning english a long time ago but my writing sucks. -> I've been learning English for a long time, but my writing sucks.

I wanna take the toefl exam so I need improve that. -> I want to take the toefl exam, so I need to improve my writing.

Today, I had take an exam for an institute that would prepare me for this exam but they told me that I will improve this item and then we can start for the preparation, so.... -> Today, I took an exam for an institute that will help me prepare for this exam, but they told me that I need to improve my writing and then we can start preparing for the exam, so....

I have to write about what I will do in the next 5-10 years or write about how I learned english -> I have to write about what I will do in the next 5-10 years or write about how I learned English.

Please if you have some ideas or books that you can recomended for improve that please tell me.(I mean easy books with good narration) -> Please, if you have some ideas or books that you can recommend, please tell me. (I mean easy books with good narration.)

*Hi Jazmin! If you want to improve your writing to take a test, I highly recommend requesting lessons from a professional teacher. Feel free to take a trial lesson and I can recommend different things we can do to improve your writing. :)