What's the difference between a full-time counselor and a part-time counselor? Do professional psychological counselors know hypnosis techniques?

For example, psychological counselors in some commercial psychological counseling institutions take psychological counseling as their profession, while my tutor is a part-time psychological counseling after school, both full-time and part-time; Secondly, hypnosis is just one of many counseling skills, and not everyone can do it (I am a graduate student in counseling psychology, and the explanation is for reference only, thank you)