Hi! I'm in the application process as well, but I know a bit about USF and UCF, so I'll try and help.
First of all, your GPA looks to be acceptable for schools of this calibre, but (this probably goes without saying) try and get it as high as you can. A higher GPA can never hurt, especially since grad schools have gotten much more competitive. Along those lines, study very hard for the GRE, even if you feel like you'll do fine. I breezed through the SAT, and assumed I would do the same with the GRE. I was wrong. I studied my butt off for the second go-around, and I did pretty well. It's not impossible, you just have to put in the effort.
What made you decide to switch from Speech Comm to Sociology? The admissions committees are going to want to know that you're not just picking a grad program haphazardly, and that you're going to bring something to their program. Make sure you clarify these things in your SOP. Will you have the opportunity to get some sociology-related volunteer or research experience in any time soon? If, for example, you were interested in the Domestic Violence track at UCF, it might look good if you had some experience volunteering with a women's shelter or crisis center. Probably not necessary, but these are just little suggestions that could boost your application.
I know that you originally posted this in February, so I'm sorry if this advice is too little, too late. I just saw your post because I too am interested in UCF's Applied Sociology program, and I figured I'd help out as best as I could. Hope that helped!