Beginning of my English learning

I decided to learn English about 2 years ago. Because of the experience of being not able to speak English at all.

At that time, I went to an international conference for the presentation of my software demo. But I can't speak English except words written on my poster. When I received any questions, I answered only 1 or 2 words. Moreover, I can't listen mostly what they were saying and can't understand almost. I was so frustrated with lack of my English skills.

I've been to learn English for about 2 years. But it takes about 30 minute to write these sentences. Oh my god...