If you want to take the civil service exam, it's not very good. There are really not many positions that can be applied for in advertising. I am also taking the civil service exam now, and I will take more positions than when I was an undergraduate.
So you have to weigh it yourself. I didn't want to take the civil service exam, so I took the postgraduate entrance examination. The liberal arts have high requirements for English, and our cross-majors didn't do very well. If you want to study communication, you must work hard on English. In China, many exams are about English. Anyway, you must accept them. Just study hard.
You can take an examination of a university in Guangdong (it is easier to find a job in the future) or Jiangxi Normal University (where my university teacher graduated, which is not bad). You can go to the forum more and pay attention to this information. Good luck!