Pity for her...

I am a librarian and I am currently preparing for my final exam.
She's (who is 'she'?) also a librarian and librarians of same age with as us are ordered to prepare for this year dinner. I mean (the?) librarian's dinner. (This last sentence is a little confusing. Is the librarian's dinner a big event?)
Unfortunately, the place is an open space out in the open and it rained quite heavily last night.
She (who?) is the one who prepared so much and sacrificed her time and energy, but it all wasted in a the blink of an eye.
But Thankfully, the former librarians helped us to make the situation better. ('helped us resolve the situation' would sound more natural)
It's indeed a pity for her.

Good work!
In English it sounds odd not to specify who someone is before you refer to her as 'she'. Other than that you only made a few minor mistakes, and I changed some things to make it sound more natural.

First notebook entry: Introducing myself

Hej,

Jag heter Lena, jag bor i Tyskland, men jag kommer från Frankrike. Jag är trettio år gammal. Jag vill lära mig svenska, eftersom jag tycker om detta språket.

Allting är korrekt, men min förändring låter mer naturlig. Bra jobbat!
It's all correct, though my change makes it sound more natural. Good work!

My interests

I find joined this web page because I want (actually, I need) to learn English, for a lot many of reasons. I know Spanish and I think am a good teacher (I think), so I would like to teach some people too as well.

Studying (I think this sounds more proper in context) English

Sincerely (You don't need to use both 'sincerely' and 'to be honest', and 'sincerely' doesn't sound natural in this case) To be honest I have always been interested in learning English, since I was just a child.

Nowadays is more a necessity than an interest due to the high English skills you must have to get the opportunity to enter the employment market. Without having good English abilities, the possibilities to of finding a good job are quite low.

That's because the world where we are living now is not the same as it was a few years ago since the globalization made all the countries work together to carry out sales, transactions, agreements… so a common language is needed and that language is English.

As I mentioned above, the reason why I want to learn English due to it is being necessary to find a job and stand out from the rest, or at least not to stay below the average.

Leaving aside the employment interests, English is a language that, how as I said before, I have always loved and staying one year in England will allow me to improve my English abilities.

So I hope to reach the aim my goal of improving my English skills.

This was my first time correcting anything on this website, but I tried my best. Good work!