Read it, write it and speak it every day at least for couple of hours. Do you have a studybook? Don't give up even when it feels hard. If you want to learn it, you really have to put your mind and time into it. It won't be easy especially in short time, you don't have time to make mistakes like forget to study or be lazy. Watch a lot of movies or tv-shows in english with english subtitles - Listen and learn! Try to do something you enjoy while you study. Make it fun! For example if you want to get in shape and you hate gyms, you don't go to one. You go swimming or running if that's what you like to do. Be strong! You will learn if you're willing to work hard for it.