Diary

Today, what impressed me most was the experience I suffered (see note 1)  It was the first time I got a job in a restaurant, which offers western food, like beefsteak.

I woke up early and got everything ready to go to work (see note 2). It took me 20 minutes to walk to the restaurant, but I didn't feel tired and on the contrary, I had a sense of excitement. I put on my work clothes, but didn't know how to tie my headband. One of my colleagues, who was about the same age as me, helped me to do it up. She was the first people person (see note 3) that I got to know in that restaurant, and she showed me how to do my job.

 A  The person in charge told me that I would be working as a waitress in the vestibule, and my first job was to make tea for the customers. That was not a difficult thing task  (see note 4), the most difficult things aspect of the job was that sitting down was not allowed.

There was a monitoring system, if you felt tired and sit careless,and was seen by boss, and if you were caught sitting down whilst working, some of your wages would be deducted, may be 100 yuan or more. So even though my feet were extremely pain hurting, I had to keep on standing until I got off work.

Time had passed quickly. Today I had made lots of friends, and a first taste of work experience in our society. May be you would say this type of low-pay job is a waste of time, but I think I got something far more important than money, and enrich my holiday.  Do you agree with me ?

Note 1. what impressed me most was the experience I suffered 

In English , impressed is usually associated with positive feelings or emotions. 

Examples: He was impressed by her intelligence. We were all impressed by the beautiful scenery.

Because ‘suffered’ is a negative emotion, your original sentence became almost like a self-contradiction.

Suggestion : Today, my first job of working in a restaurant had left an indelible experience in my mind.

Note 2.  I got up early and got everything ready  -  you repeated the word ‘got’ in the same sentence. Not a good writing style.

       Alternative suggestion : I woke up early and eagerly prepared myself for work.

Note 3.  An individual is a person. People is always more than one person.

Example:  There were many people in the karaoke bar, but there was only one person singing.

Note 4.  “that was not a difficult thing” – “thing” is too informal for written English (unless it’s part of a dialogue). Although “thing” can be used in spoken English, you should always try to use alternative vocabulary in written English.