How exciting -- freshman year at CSULA i have to say should be the time to really buckle down and get serious about your GPA and what you wanna do. I am a full time student at CSULA, started off as a freshman and took all the science classes there, except Micro (I took that at ELAC). Honestly, my advice to you is to really put your mind and heart to it -- do your best and give it all you've got. Try getting all A's in all your classes because that really benefits your chances of getting into the program, along with a decent to high TEAS score.
And in terms of clubs, because CSULA is a commuter college, we're not so much frat/sorority oriented, if that's what you're asking. I know that there is a nursing organization on campus but I believe that it's only for students who make it into the program. Honestly, dont stray from your books and spend the next 2 years finishing all your major classes. It's worth it in the end.