Listen to English frequently to improve your listening and speaking skills. Read to improve your vocabulary and writing skills. Finally, speak English with others to practice the language and be confident.

Hi Mostafa, The best way is to follow good examples, and pay attention to your own writing. Many of your errors in your question were preventable. For example, native English speakers avoid childish contractions like "wanna", "plz" and "thanx" (really, we don't use them), and we pay attention to capital letters and punctuation. We check the spelling of a word if we're not sure, and none of us shorten "language" to "lang". Please make sure that what you already know is correct, and your progress will become much easier.