Good you have all the required books in hand..!! Since you have 120 days....keepng aside 30 days for revision, you have 90 days to complete your portion..If you give each subject 10 days each, you can easily complete your portion in 80 days..! 10 days buffer.
FR : 2 days for Holding Subsidiary, 4 days for small topics, 4 days for Accounting Standards..
SFM : This might take up some time since you havnt taken coaching. So try to understand the concepts nicely and concentrate well. You will succeed for sure. 2 days each for forex and derivatives, rest small topics can be completed in 6 days.
Audit : Nothing special, Can be easily completed in 10 days. Start with bigger topics, esp prof. ethics which are asked in exams for sure ( 8 mks).
Law : Can be completed easily. Start with directers, easiest and lengthiest, dont miss out on any of the allied laws.
AMA : OR will take some tym , but once you understand the steps its mechanical, so give 5 days to OR, Marginal Costing will take up quite some tym in Costing, Spend 2-3 days...the rest are small topics. If unable to complete in 10 days take 3 days ou tof the buffer of 10 days and complete.
ISCA : Very scoring, can be easily complted in 7 days, keep on revising this subject.
DT : Will consume some tym but once your done with it, it become easier to revise. 10 days are more than enugh.
IDT : Complete Excise and ST first. IDT is very scoring so do the sums well.
Dont forget to refer to Practise manuals. They help a lot in revision before the exams.