What's the difference between the legal profession and the lawyer profession?

I also took the self-study exam. Personally, I feel different. Self-taught exams are all in the field of law, but lawyers are generally civil and laws are criminal. Personally, I think it's better to study law if you want to be a lawyer, because you still have to take the exam in the future. The examination focuses on criminal law. There is also a saying that lawyers had better take more subjects, but I think it is useless. If you don't study now, you won't have to study later? For reference only.