How should i to learn English

In China, student should to learn English all the primary school,junior middle school and senior high school.

In China, all students should learn English from primary school to senior high school.

So i learned English is so meny years. But my English is still very bad,

So, I have learnt English for many years but my English is still very bad.

inEnglish,it have 26 letters,26letters combination so many words,

English has 26 letters which when put in combination, can make a huge number of words.

is diffcult of me to remember so many words,and i often forget the order of letters in some words.

It is difficult for me to remember so many words and I often forget the order of letters in some of the words.

I think words is the most important in English,so i learnning English is all immerse remmber words,but is no effect,so what should i do to learn English? Who can hlep me?

I think words are the most part of English, so when I learn English, I try to immerse myself in remembering words. But, there is no improvement so what should I do learn English? Who can help me?