Learning something new, please write a correction.

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Please write a correction.

I am quickly easily bored. When I start something new, I will learn it, I will know it, and 
if it is tested I will get a high score... But then I am get bored with it again [didn't think it was necessary since you only introduced the "something"] and
I forget it. It's not very beneficial for my career. And the latter [not sure what "latter" is referring too" Was it the forgetting?] is even worse
now that I am facing unemployment. I lately studied Korean. But now my employer wants
to fire me, and it's useless. It already was useless[no comma needed] since the Koreans I work with
do not know English very well, but before I would talk Korean better than their they talked
English, so I should have studied it for a year or two at least. So, [didn't think it was necessary--but were you using "so" as an interjection or a 'pause-word' in this case?] I actually did
it to impress Korean waitresses and stewardesses, and this was a success.

But, what to do now? I have thought about the following options:

First Aid. I have my First Aid diploma, and I am a volunteer for the athletic club.
If I study this further, I can be First Aid coordinator. That always sounds good
on your resume. You can say you have organizing skills and become a manager.
But [OR: However], I do not like management. Not really. Not as a primary task in my job at least.

English. It's of course the language most used in trade and science. But it's boring.
It's no challenge. I think my English is good enough for a technical guy, and since
I do not want to be a teacher or a translator, I doubt if improving it has any use.

German. The thing with German is, I studied it last year, and I got a certification,
but my score was far too high. I did a sort of 'B1'-level test, got 90%. I then subscribed
for a 'B2'-level test, got 90% again! I should have tried a 'C1'level test, but
I was already bored with it again [OR: bored with it by then. ... was that what you meant?].

Information Science. Worst and best option. Worst since it totally bores me, since as
I already do stuff with computers 40 hours a week. Best since[no comma needed] it would be the most
beneficial for my career. I am, after all, a computer programmer. I should then
probably study a thing called WPF, if that rings a bell with you.

Well, what should I do?