Iโve just finished year 12 and I do biology maths and geography so the workload was quite high. At the start the work will be overwhelming, I was doing chemistry too but 4 subjects was too much for me, itโs better to focus on 3 and do them well.
Make the most out of your study periods, there are people who just waste them and chat, which is fine do to a few times but the majority should be spent working it will make your life so much easier when you get home!
Also Iโd say you should revise thoroughly for each little end of topic test and make good revision notes as when it gets to the end of the year you donโt want to be panicking and making revision notes for absolutely everything.
Most days Iโd come home and just chill and watch Netflix seeing as Iโd the majority of work at school and I still managed to come out with AAB in my end of year exams, Iโd say if you manage your time well itโs not really that stressful
Good luck!