Welcome, Kelly! Congrats on joining and making the decision to improve your health! You'll get plenty of support here...lots of like-minded people who will encourage you, help you stay on track, and celebrate with you!
Does your college have a fitness center that's free to students? If so, take advantage of it! A free gym is something I miss most about college now that I'm out in the "real world"... =)
Best of luck!!! Keep everyone posted on your progress and let us know if you have questions or need support.