Hello

Well, My name is Miguel Pimienta, i'm from Mexico, (Puerto Vallarta) I really want to learn English, so if somebody wants to learn Spanish, we could practice it. Im an accountant and I studied have a masters in business administration (You could say "I'm an accountant and I have a master degree in Business Administration"), Now im studying to be a financial master(I don't know what that is), so I may have some topics to speak about with all this situation with the world. haha Regards!

Back from work.

I took a part-time job as a shop assistant in MUJI last year.Have you heard of that Japanese brand?
It was my first try to take up a part-time job. Becasue Because (I forgot to say that also "because" is frowned upon as a way of starting a sentence, you can say "It was because" of heavy studies at the end of the semester, I asked for leave this January, and today was my first day back since then. The blue is just a suggestion) of heavy studies in at the end of the semester, I asked for leave this January, and today was the first time back to working in MUJI's shop again this year.

Unfortunately, today was very boring...There were only a few customers, and most of the time I was just standing in front of the fitting-room. The worse thing was some colleagues whom I was familiar with quit the job some days ago. I felt a little lonely and missed them.

Although I don't like this kind of jobs (since you wrote this and kind, I assume you mean singular so there shouldn't be an s in jobs), I appreciate what I've learnt (this is correct learnt, just for you to know, learned is more commonly used than learnt in the U.S.) and experienced from it. In addition, it advanced my social skills. I'm really a shy person and I was afraid of answering strangers' calls...But now it gets much better.

Besides, I love MUJI's design concepts very much. Its goods are simple, useful and qualified.(Qualified?) 
Its designers - 原研哉 and 深澤直人 are my favourite designers as well. I've read some of their books. Their thoughts are profound and I think I should learn from them.

Finally, I hope I can insist (I don't think you mean insist, it means like forcing. So I think don't think you mean to say that you hope to keep forcing yourself to work) on working...Good night everyone.^^

I'm a little nervous

I feel a little nervous now because I will be quitting (since its a future action, you add a be before the verb) my job this afternoon. My boss will come to be at (sounds more natural) the company in the afternoon. I will talk to him when he comes. I have made up my mind to leave this job. Wish me good luck!

Good luck! =]

Yesterday was my friend's birthday

My high school classmate invited me to celebrate his birthday with him yesterday.Also other classmates whom I haven't seen for a long time were invited. (The also should be at the end of the sentence. In English its frowned upon if you use "also", "and", and "but" at the start of a sentence in formal writing) Oh I missed them so much!
Since I haven't seen them for years, I was worried about if it would turn out to be a little awkward.But it wasn't! We had a wonderful time yesterday. The birthday boy was delighted as well.

I uploaded the birthday cake :DD
It was bought by the birthday boy's lovely girlfriend.A tasty strawberry cake.
We played board game after our dinner. (If it is just one board game, there should be an "a" before board game, or add an s to game for multiple games.) That was crazy,and we didn't go home until 10 p.m.

What a nice day!Hope I can meet them again soon.

It sounded like you had fun at the birthday party. I bet it was a blast. =]]

The concert.

Last time I went to see Jay Chou's solo concert. Jay Chou is famous as a pop singer, and he is talented in rock and pop music. The solo concert lasted for almost five hours, and he sang all of his hits. I and other fans Other fans and I believed(more like thought) that it was ace(I assume awesome?Great?)! (I would of written it like this, Everyone thought it was awesome!, sounds more natural）

You listen to Jay Chou! I listen to him also! haha I guess he really is that popular =P

First notebook entry: Introducing myself

First,I should said say,I'm an avtive active girl. I like to make friends with others. Because I was just set foot to here.,I hope the instruct to learn from other friends.Now I waiting for you contact me.If you want to realise know more about me more,don't hesitate to chat with me.

Hi Leah! Nice to meet you!