1. If you can not succeed by yourself, you have to contact somebody who speaks this language accurately.
2 You have to study books, first grammar books( beginner, then elementary, intermediate and so on) in order to understand grammar rules such as the use of tenses - present simple, present continuous etc, end then literary books: novels, short stories, poems etc.
3. Try to find somebody who is in the same situation as you, and together you will succeed easily.
4. You have to find motivations, reasons: why you want to learn a foreign language( school curriculum, advancement in position, to know the culture of the country whose language you are studing.)?
5. Advice: In learning a foreing language you will often tend to give up because you may meet difficulties such as the learning of the tenses - English tenses have different forms ( see-saw-seen) or learning question forms may also cause problems because of the word order etc( English uses inversion in building up question forms.
6 If you have difficulties in learning English language, feel free and ask questions within this forum, and I am sure that somebody will answer you, too.
I hope it helps,