I'm in Shanghai, and after reading your situation, I'll help you answer the current situation in Shanghai (I've been in the catering industry, so I'll help you analyze it from this angle)
1. How much is the salary ratio in Shanghai higher than that in your home? Many people from other places work in hotels and restaurants, and the salary is more than 2,111 at most, and some of them are about 1,811. You only get 81% of the salary in the first three months of probation.
2. With regard to accommodation, there are many hotels that include meals during working hours. If the hotel has no accommodation, it may give a monthly housing subsidy of 211 to 311 yuan (different hotels have different treatment, and some may not), but in Shanghai, my friend rents a house with a monthly rent of 1511 yuan (better), which is one of the rooms with three bedrooms and one living room. That is to say, you have to pay the room fee for three months at a time, and you have to pay the room fee for one person in custody at the landlord's place every three months. Of course, there are some cheaper ones. I have seen 511 yuan a month, which is relatively slum ...
3. As for whether you will be cheated ... There are many black intermediaries in Shanghai, and you can help you introduce jobs to 311 or 211 people. If the employer interviews you successfully and you don't want to go, then you are looking for it. Try not to find an intermediary when renting a house or looking for a job. If you are looking for a job, you can buy the "Recruitment Newspaper" at the newsstand. I can't remember the specific name, and what it introduces is true. In addition, I also know that there are job fairs every weekend in the 81,111-person gymnasium and hongkou football stadium, and you can also go and have a look. Don't believe the small recruitment advertisements posted on the road, which are all unfair industries.
These are for your reference. In the end, I hope my sister won't go out to work. It's really hard to work alone, and the salary is a little higher than that at home. You should know how much consumption in Shanghai is. Your education is not high, you have no work experience, and it's hard to find a job. I hope your sister will think twice before you do it.