@yuxili0128 I passed AUD and FAR in the same window, while married and working full time. The trick for me was to schedule one of the sections at the beginning of the window and the other at the end of the window. I started studying for AUD at the end of May, and I took the exam on July 3rd (the third day of the Q3 testing window). On July 4th (the very next day), I started studying for FAR, and I took the exam on August 24th (near the very end of Q3 testing window). I passed both.
After taking AUD, I had to just focus on FAR – knowing there was a chance I didn't pass AUD (I didn't get my score until a month later).
In your case, I would study for a part, then take that part. Then study for the next part, then take that part. I wouldn't study for two at the same time. I think May (right after you graduate) is a good time to start studying for FAR. That will give you nearly two months to study between the time you graduate and the time you would take FAR in (hopefully) early July (the beginning of Q3). Then, if you take BEC at the end of August, that's a sufficient 6 or 7 weeks to study for BEC, after you've taken FAR at the beginning of July.
I don't have specific study tips at this time for you, and I think it really depends on your personal methods, and what works best for you to ensure that you commit the information to memory. If you insist, however, I'll give you the advice that you must allow your brain time to digest the information. Don't be afraid to take breaks. Step outside, call your parents or a friend, go for a run or a walk. Put in the hard work during your study windows, but give yourself time to take a deep breath in between. You must do that, or you will get burnt out too quickly, before you've even taken one of the four sections. I would strongly recommend taking 1 day per week to do zero studying (in my case: Sundays).
Outside of that, I'd say just write out a study plan and stick to it. Give yourself short-term goals, such as: “by Saturday night, I'll be finished with chapter 2 and consistently making 85% or higher on progress tests specific to those chapters.” Do whatever you must do to reach those goals by Saturday night. Then, recharge on Sunday (as an example of that 1 day of 0 studies), and be ready to tackle your next set of materials on Monday, to be completed by Saturday night.
These weren't specific bullet point study methods. Hopefully you'll get what you need from others as well. But I hope this advice will be helpful to you.
Good luck!