I have been to the psychological counseling room of our school, and the assistant is a student (the situation is different from yours). I went there several times and found that she did the same thing: 1, registering the information of students seeking psychological counseling; 2. Chat with classmates waiting outside the consultation room. I have never seen an assistant give psychological counseling to students alone. Every time I go to school, the teacher is there and there is only one consulting room. The topics we talked about were simple, such as what happened in the school (hospital) recently, the employment situation of related majors, what happened in Wuhan recently (our school is in Wuhan, hehe), and sometimes we said some encouraging words.
As for cleaning, I don't know. Anyway, every time I go, it's clean, simple and tidy. There are also some books and magazines that seem to be for people who don't want to chat with their assistants.
You should be a professional consultant. It is estimated that you can replace the teacher when the teacher is away, or there are more consultation rooms. You can also provide psychological counseling for those who look normal.