3.2 gpa, transfer

I’m in my 3rd semester at my CC, and I’m taking 5 classes this fall semester. (4 college credit, and 1 remedial which doesn’t give me any credit), I have a 3.2 gpa so far and I would like to maintain that or even go above. I wanted to know how many classes should I take in the spring semester so I can graduate by either May 2018 or August 2018? Should I take winter and summer classes as well to speed up the process? Also do you have any study tips on how to not make my gpa decrease? I already have one C from last semester it was my sociology class- most hardest class of my life. I do not want anymore C’s. I’m in English major I need 60 credits to grad, I currently have 18 I’ll have 24 once I finish the fall semester. My school has may, august, December, and Jan graduations. My ideal goal is to grad by may or august.

Thanks!