hii!!,
just like you, i'm also doing bio 1/2 and methods 1/2, along with 3/4 psych, 3/4 general math, 1/2 chemistry and english 1/2. i was also really worried about managing my time well and reducing stress, and so far i've found one way to do it, which is by batching my subjects. everyday i spend 2 hours each on two subjects (since i have 6 subjects i have 3 batches of two subjects) and i've found that not only does it allow for active recall every 1-2 days, but also less stress since i can focus on my 3/4 subjects without being stressed about 1/2 subjects. for example, today i'm studying methods for two hours and , and then two hours on chemistry. obviously you can spend more than 2 hours as you wish, but since i do extracurricculars, its more convenient for me to do 2 hours of study without a whole lot of stress.
as for methods, i was (still am) struggling, but working on it for 2 hours 3-4x a week has really really improved my ability to even do math (i'm literally a humanities/english person and literally was getting so bad in math last year).
also, my other tip would be to skip questions that are taking too long/too hard, and do them after finishing the rest of the exercise. i remember once i studied for four hours straight and lost all my motivation because in those 4 hours i only did about 5 questions because i was too busy doing the same question over and over again. i can't stress enough on how time saving it is to leave questions you find hard, preferably write them in a little notebook so even if you can't solve it even after finishing one exercise, you can talk it out with the teacher. my tips are so simple yet they drastically changed my life, because before i was literally studying randomly and all over the place, which caused me to stress so badly because i wasn't giving my subjects the same effort and time. sorry for rambling but i hope this helps somewhat.
