Lost in BJ

Recently I’m completely disoriented. The year before last (year), I met Mandy in an English Corner and from*1 then we began to study English together for getting the quota of Australian WHV. However, last November, she got the quota and I failed. At first I envied her a little, but soon after*2 I congratulated her, but*3 truly, though*4 I still felt frustrated. I had all my hope on that, because I thought*5 if I succeeded, I could escape from the reality for a while, and I also could observe the world infrom another perspective. The more you expect, the more you are disappointed*6. Now I don’t know what I should do. Continue to study English or try to study computer? The former seems useless for me now, but the latter needs me to quit my job. Can I learn it well and can I support my life without any income for almost half of a year? That’s a big challenge and I’m not ready for that.

How about studying English a little bit more here?

Please be more confident, for what you have accumulated so far will never escape from you. It's not bad to study new things as well, but I think you still have much potential to improve this language ability further.

These are the points I corrected. Actually your writing is just good originally. So please sort out what you want from it. 

*1 "began" indicate a point of time. So "from" is not needed here. Or you can say "since then we have studied ..".

*2 It's more natural with this "after".

*3 It is better to put "but" here for easier understanding.

*4 "but" and "though" have the similar meaning and should not be used in a sentence. Or you can say "soon after I congratulated her though I still felt frustrated truly."

*5 Please don't forget to match the tense. There are some words you forgot about this in this writing. 

*6 Please note that "disappoint" is transitive verb.

Because I often have free time recently, I am willing to check your writings if you don't mind. Thank you.