combo of F6 and F7- HELP!!!!

I am aiming to take both Taxation and Financial Reporting in the September 2020 exams. I have already learnt quite a lot of FR, but am just starting Taxation now and have just discovered that the textbook is 1000 pages long and am starting to get REALLY worried!!!!!!!
Please can you advise if its feasible what I am planning to do and what is the best way to go about learning the material?????
many thanks