Experience (Correct me, please!)

I have always had difficulty with english. I tried to learn it more or less four times, but I always stopped. One year ago I lost a great opportunity in to do an interview for a big company, because that moment I didn't speak nothing in any english and (then I opened hand about many things in which I liked to do and I began to dedicate about it,) I'm not sure what this means, maybe "then I realized many things I would like to do and I began to be dedicated to it. 
we can realize as english is so important in this world. Nowadays everybody must learn it, there will come a moment that if you want to survive you will have to speak this language. it's very important.
There are new experiences that we live day-by-day. Today you lost a good opportunity and suddenly you become a person able again in to face it to face it again, but now you have a great possibility, or rather, you have an english Lol.
as I am student, this text has some mistakes.

Don't be afraid of mistakes and don't let that experience be a waste. It would be a waste if you had to learn that lesson again in the same way. :(