Yes, you can if you are prepared to work hard) https://www.youtube.com/watch?v=d0yGdNEWdn0

You can indeed, but it'll be harder for you than for say a native German, French, Spanish, Italian or Dutch speaker, whose languages share much vocabulary or basic structure. You need time and motivation, also to use the tools well. If you were living in England, you'ld likely have little choice, BUT to become fluent in 8 months. If you are in Iran, it's much less likely you can succeed.

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Hi Taranom, Where do you live now? If you don't live in an in an English speaking country, do you work in a place where they do speak English? Do you frequently visit English speaking countries? If you answered no to any of the questions, then it will be hard as you need to practice daily using what you have learned. It is important to be surrounded by native speakers because spoken English used daily and written are a little different.

I have studied Spanish for 4 months, by practicing conversations for 2-3 hours every day. Now I can order food, ask for directions, book a hotel, talk about the weather, talk about myself, make weekend plans, talk about my hobbies, describe people's personalities, etc. I still cannot understand most of the news or books, however. For you, what do you consider as fluent?