You can study by yourself with many resources for example this pages www.busuu.com or www.livemocha.com or u can get a teacher here.

How to learn English.(not enlish) I do not know what do you do .If you are still a student ,you have a lot of chances to learn English at school.Take good use of your good teachers and ask what you want to know.But if you are working now(first of all ,I should appreciate you passion about english0，you can go to some night school to improve your english.For my part,oral english is very important ,so go to some english corners to practise it .I think you can find some parters and warm-hearted "teachers"to help you .Hope you can come here to ask any questions as you can .good luck..