going to a top undergrad only moderately increases your chances of being accepted at a top law school. bottom line, do the best you can in undergrad and study hard for the lsat. those two factors alone are paramount.
Debt from your UG should be a huge concern, since a top LS without a scholarship will cost you ~150-200k these days. Go to a school where you can pay very little.
wouldnt going to like a top college look bettor on a resume
Are you out of your mind. No one needs to take a practice LSAT "just to see" while they are still in high school. The LSAT is very learnable. I think the vast majority of people could learn to do very well on it given enough study time, and four years is far, far, far more than enough. OP, do not take a practice LSAT.