Schools loved my military experience...it surely wasn't my GPA.
joining the regiment isn't easy, there are so few slots and those probably are a ton of west pointers...I mean that (the scroll) is a way of life where the tab is a qualification. I'm going to presume you're a PT stud, right? like 80-90 pushups in 2 minutes, about the same sit ups and 13 minute two-mile run and about 20 pull ups sounds like fun to you, right? Honestly, people don't go to the regiment and then try to get a green beret just to get out in few years to go to law school. But, getting a slot to ranger school itself isn't that hard, you'll probably just get the tab and then go to the 82, 101, or 10th mtn afterwards. That's very, very common. It's just that you don't go to SOCOM and then get out that easy...it swallows your life because it is a way of life.
That said, I'd go find the ROTC battalion commander at your school and ask him about figuring out what the best way would be to get the branch you want. If you don't know anything about the Army yet, learn this...never trust any one's word; demand to see the regulation or manual or pamphlet. And then, when he gives you answers, ask him which AR (Army Regulation) it comes from.
My only worry for you is that you will be behind on the PT and learning curve before you go to LDAC and might screw yourself somehow. I do not know how that works exactly, so I can't say if my fear is grounded or misplaced, but it can be hard to get branch transfer once it's done. I can't tell you an exact answer, but you need to do a lot of asking around.