Undergraduate students, no matter how good the school is, are not recommended to sell houses. To put it mildly, everyone can do it, but to do it well, you need to have a level. Then it's even harder to change careers. If you idle away, there is no future.
If there is a commission, it is generally a few thousandths of the house. It depends on what the company says. As for the probation period, if your house is not sold well, there is basically no contract for you. There is a simple reason. As you said, 1200 does not meet the Wuxi minimum wage standard.
I don't suggest it, and you have to ask what real estate it represents and whether it sells well.