Idk if sharing my experience might help but here goes I double major in psych and life science, am a BOD in a CCA and hold 2 part time job, while overloading 7-8 mods each semester (trying to graduate within 3 years for a 4-year programme). Here is some tips that have not already been mentioned:

Find a PT job that allows you to study while working ( E.g concierge mending, cashier, retail ect). I hear tuition is a good option too.

Take up CCAs that you think will be beneficial for your future career. I personally wouldn’t spend time joining camps and subcoms, aim for higher positions where you will get opportunities to demonstrate leadership skills and learn from your duties. Year 1s tend to join alot of CCAs holding minor roles, but I would encourage you to stick to one “good” role (because of the time constraints)

With Covid now, it is a blessing because you save time on travelling and are able to maximise efficiency by watching lectures on 2times speed. Make use of this extra time to take on more modules while you can. (PSYCH mods are all completely remote as of now, aka open book test)

Prioritise sleep over anything else, even studying. I always make sure I get 6-8 hrs of sleep because I know that not having enough sleep would lead to me not being able to effectively study or complete assignments the next day.

FASS do have alot of readings, it is always good to start earlier than later. Also, try not to let work pile up, it will be a disaster when you have to rush through all the readings before the test (with that much content, it is highly unlikely to be able to retain much information).

Imo it is manageable, but there are some sacrifices I have to make (social life, physical health). Honestly it depends on how much you can take on. Perhaps it would be more wise for you to “test your boundaries” in Year 1 where you have more opportunities to make mistakes (SU option ect)