http://www.greekchat.com/gcforums/sh...d.php?t=119719 <---- read that, for the second part of your question.
How you get to know the brothers more intimately will be up to you and will be dependent on your campus norms. On some campuses, it would be perfectly okay to set up a one-on-one conversation with a member and disclose your interest in the fraternity. On other campuses, members might not even want to meet with people on on one.
Continue getting to know the members and you will discover the best way to disclose your interest.