Law school coursework:
It'll vary a little by school, but typically in the first year you will take Civil Procedure, Torts, Criminal Law, Contracts, Legal Research/Writing, Property, and Constitutional Law. After that, you'll have the freedom to choose your own classes - people could end up taking Evidence, Corporations/Business Organizations, Admin Law, Labor Law, Family Law, Tax, etc. Here's NYU's list of topics if you want to dig around a little and see what classes could look like, for example. http://its.law.nyu.edu/courses/
(picked NYU because that's where I went, but you can Google this for any school you're interested in)
Story's idea of reading E&Es (Examples & Explanations series) can help too. You can also read One L by Scott Turow, Ivy Briefs by Martha Kimes, or any other memoir-esqe book about someone's years in law school.
What lawyers do:
There are tons of different legal fields out there, so what a lawyer "does" varies a lot. What I do and work on as a litigator in big law varies a lot from what my husband, a lawyer at an environmental non-profit, does - and we're both in litigation. Honestly I would just Google "a day in the life of a lawyer" or "a day in the life of a [insert field] lawyer" and see if anything looks interesting to you. Shadowing a lawyer at a place that does the type of work you're interested in could be helpful, but obviously hard during COVID.
Examples of some laws:
Here, have some laws. https://uscode.house.gov/
This is not going to give you any insight into whether you'd like being a lawyer though. Reading the United States Code may put you to sleep but you may love advising clients, negotiating deals, researching and drafting a legal brief, etc.