I thought about being a lawyer once, but it seemed like it was too much arguing. 
Well the job a lawyer can vary a lot across jurisdiction, but yes I believe arguing is always one of them.
Do you know anything else about what they do?
A lawyer is person who practice law, but not necessarily an attorney, sometimes paralegal, advocates and counselors are called lawyers too.
I've never heard of paralegals being called lawyers. I've always thought of them as assistants!
It is true that it is not that common, generally paralegals are those qualified by training or experience to perform substantive legal work with a lawyer. 
What kind of work do paralegals do?
The definition of Paralegal varies depending of jurisdiction, so what task they perform will vary in the same way.