Barristers-at-law, specialise in international clients.
You will never know for sure, until you actually do what lawyers do. There is no substitute for actual experience. That said, there are many different types of lawyers. Trial lawyers don't live the life you see on TV or in the movies. There are corporate lawyers, and regulatory lawyers and sports agent lawyers and real estate lawyers and Estate lawyers and . . . . . Well, you get the idea.
Decide what you want to do. Having a strong sense of right and wrong can be good, or it can be a curse. If you work in a firm, you may have no say over the types of cases you handle. You may have to represent or defend people to whom you are morally opposed. The vast majority of lawyers are solo practitioners, because of their entrepreneurial spirit and their fierce independence. At the same time, many of them are starving, because people think that all lawyers are rich, so you won't miss my fee. The 13th Amendment (abolishing slavery) also does not seem to apply to lawyers. You can be compelled by a court to continue with representation for someone who is not paying you.