Ca final exam with full time job

Dear Experts, I need your valuable suggestions on how to clear CA final exam while doing full time job. I had completed my article-ship a year before but due to financial crisis I started job immediately and till date I am scared of appearing in exam due to less preparation. My working hours are 9 to 6:30 and I am unable to go for coaching classes. I am planning to appear for Group - 1 and so far I have completed 50% syllabus in Audit and Law, not done anything in remaining 2 practical subject. Please advice whether shall I appear in coming May or in November. I will be able to get 15 days leave during exam period. Thank you.