i have to get IELTS score before the Jun and i really want to increase my English skill.
develop your writing skills by reading published writings here. Also, giving and taking some thoughtful feedback are the best way to improve your writing.
i have lack of ability to make command to others works
Even though you are not confident about your English language skill, you can help others, as always. I still believe they are not able to digest their writings as good as you digest. They need you to tell them how their writings affects you, as a reader. Be confident is the number one, then try and fix the writings as best you can :D