i don't think it's too late for you. I started to prepare GT and application when I was second semester junior in college.
you just have to take GRE before you reaches your senior year.
One suggestion, don't expect others make plan for you. no one would know how much you can handle. like I done with GRE/TOEFL in 4 month (including the time for preparing and actually taking the exams) which may not work for you.