I don't know what your major is, but since it is public administration, you can sign up and try to see if you can get in.
3. The difficulty of the test questions varies from year to year. If you want to enter the interview, you must get at least 65 points and apply for 40 points.
Suppose you are admitted. Be assigned to this recruitment position (generally speaking, the probability of being assigned to this recruitment position is relatively high because the conditions are already difficult). It is normal for female students to change shifts at customs. The length of time depends on whether there will be work exchanges after you go.
The income of customs is really not that high. If you count the cost of renting a house, the basic living expenses in Shanghai should not be a problem, but it is a bit difficult to get rich and buy a house.
Note: the advantage of being a female civil servant is stability, and she can take maternity leave at will. And after all, there are still girls at work. Personally, I think the career of civil servant is quite suitable for girls.