You have to study core courses in a law degree, you don't just pick a specific area. You can do so in law electives, but you're always gonna have to study criminal, contract, torts, constitutional, property, etc. There's probably going to be courses you don't like as much. If you're just generally interested in how the law works, you'd probably find any of those interesting.
As a first-year, I'm doing foundations and contract law. I enjoy both of them. Foundations is basically year 11 legal content, about the legal system, court hierarchy, precedent, common law, etc. Going into the degree, I thought I'd find contract boring, but I do really like it and find learning about it interesting (as well as applying what we have learned to legal advice scenarios). I don't think you necessarily know if you'll like something until you actually try it.
When people say there is A LOT of reading, they mean it (literally assigned 80 pages per week in contract), and it can be dense and dry for people. A lot of people who just did law for the sake of it (lots just in there bc they got the ATAR and didn't know what else to do) seem pretty miserable tbh, and there are people considering dropping out by wk8. It is a bit of a shock starting with the workload, weekly legal advice, weekly assignments, and the pace of the course, but you settle into it.
In legal, I did some human rights, criminal, family, and international - I enjoyed all of what we did. A law degree obviously immensely expands upon all of that, and it's really not necessary to have done legal studies other than getting a very foundational idea of whether you like law; law at uni is quite different from legal in a lot of ways.
Someone further into a law degree/law career would have a better idea of the pay/employability and the rest of the areas you mentioned.
