Hi Nurcan!
first a little correction for you:
Can anybody help me? I want to learn English.
I do not know your level but if you are a beginner this website might help you well. They have elementary and intermediate lessons also.
http://www.bedava-ingilizce.com/
I like to follow word of the day applications of the languages I study, on Facebook and Twitter. Especially when they have sample sentences it really helps me to improve my vocabulary.
I have a website to teach Turkish and I'm publishing a word and at least four sample sentences with English translations everyday. It can be helpful for you to read those sentences daily.
http://blog.learnturkisheasy.com
You can meet the native English speakers that want to learn Turkish here which would be the best option for you.
Also, I would like to help you as much as I can.
Good luck!