FAR is a beast. I had the same problem… I actually had to push back my test date 3 times because I just did not feel ready when the test week came around. I cant give you a time estimate of how to finish off the remaining sections you have in FAR, but I will tell you what I did. FAR was my first test, so I came at it with no real strategy. I thought just watching the videos, then reading, then doing the IPQs would be enough. This seemed be all good until I was getting to the last sections of the review, and I realized I had begun to forget a lot of stuff from the beginning. After I passed FAR and began to study audit, I realized that I was wasting a lot of time reading and taking notes. There is a lot of clutter in the book that you simply will never need to know for the exam that you will spend a lot of time making notes for and memorizing.
For FAR you really want to make sure that you watch all the videos and work each sections MCs at least two complete times through. The content you need to know for the exam you can figure out from the types of questions being asked on the IPQs. You'll start to notice that the questions are all centered around certain topics in a section. There will be a few outlier topics that you will see, try not to focus too hard on those. Try to learn from the explanations on the wrong answers, but if you can't figure it out from there, go to the book and/or lectures and figure it out. Give yourself at least one day a week to review what you have learned in the past. I would do 60 questions of what I learned that week, and another 60 that was made up from all the prior sections. The final review weeks I started with 30 questions from each section. I would work like 90-120 MCs per day. Then I shortened it to 15 per section. Then the final 3 days before the exam I would work one practice exam's MCs per day (90 questions on the old format).
I really believe that the toughest part with FAR is keeping all the concepts fresh in your head given that it covers such a broad range of topic areas. Know your J/E's back and forth for the SIMS.
I also did Roger, and I noticed, after the test, that his MCs for FAR tend to over prepare you for the exam content, which is good. You really should not discount this fact and should take the time to learn how to get the correct answers. I was freaking out because I was trending a 63% overall the day before the exam and ended out with an 82 in the end.
Also, don't waste your time watching the final review and intro videos to any of his sections. They are completely useless, just start with the first topic.