I think you're not getting as much advice and discourse as you might like because you're incredibly combative when people go outside of what you consider to be the scope of the discussion, and it's a bit off-putting for the seasoned posters who try their damnedest to be helpful in most circumstances. If you tone down the harsh rebukes of any snarky or snide remarks that will inevitably come up when you're asking questions that have been asked and answered many times on these forums, you're more likely to get continued discussion that will help inform your approach to this career. I mean, you corrected someone's grammar that was likely just a typing error that didn't autocorrect and told them to fuck off. Do you think that person is going to come back with anything other than dismissal of you seeking advice (and just so you know, that particular poster, while perhaps responding sarcastically to your question because it was a bit under-researched and naive, is one of the more helpful, actual practicing attorneys on these forums).
My advice would be as follows:
1. Worry about your college. Do well in classes. Have a good time. Get good grades. When you're ~1 year out from graduating, think long and hard about whether a career in the law is for you. If it is, and you figure out what type of law you actually want to practice, study for and rock the LSAT so you have the option of going to a top notch school or your strong regional in the geographic region you want to practice.
2. Understand something about practicing the law that you might not otherwise realize: most lawyers do become specialized in specific fields of law, rely on doing primarily the work for a few important, high paying clients, and end up focused in a niche area of law. In fact, most attorneys who make partner at law firms do so because an institutional client has come to trust their work in their specific area of law.* And solo practice, while maybe allowing for slight variation because you might help a family with a will one day, and help advise on a divorce the next, and handle an insurance claim by someone in a car accident the day after that, will mostly be fairly simple legal work that won't be highly paid or particularly in the "action."
With that being said, if you are so prone to boredom that you want to do something different every few years, you could consider becoming a JAG, should you decide law school is a career for you. While the work itself won't be demonstrably more variable than being a civilian attorney, you'll at least have the pleasure of moving every couple of years and starting over at a new unit. Given your past military service, that could be a realistic career path that will at least allow for some life variability, if not exactly professional variability.
How you interact with the people around the TLS fora will largely determine how helpful it will be for you, so please just keep that in mind. There are helpful posters in most areas of law and at most of the
big law schools and some really helpful posters who went to strong regional schools. All of their opinions and advice will be based on their own experience, and so it will never be entirely complete, but the best way to get the most out of TLS is to not engage it with such hostility. If someone insinuates that you're asking a bad question or that the answer to your question can be easily found here, just take that for what it is and move on. Not every post will answer every one of your questions, nor will the posts be precisely what you're looking for every time, but the reason this community works is because mostly people don't respond to criticism and skepticism of posts without outright hostility.
Anyway, I hope you start looking around more and seeing what advice has been given on the things that interest you about this career, because some of the regular posters have been around long enough that we forget what it was like to not know anything about the legal profession and law school in general, so we occasionally become jaded when it feels like we're answering questions that have been answered many, many times around here. So don't take offense when people respond with sarcasm or even a touch of sass and ridicule. That's just a part of being on this site, for better or for worse.
*ETA: It's obviously not the only reason a lawyer makes partner at a firm, just wanted to make the point of how success in the profession can be based on becoming very good at a narrow part of law