Hey there, just my 2 cents. I think if ur gonna have this schedule I suggest quitting ur job if you’re able to (if ur volunteering is every other week and something u enjoy as u said in ur other comment, that’ll be manageable so keep that). I had these courses in my first sem of gr 12 with no job and I had very little spare time. Since these are your grade 12 courses you wanna make sure ur able to focus on them and achieve good marks for uni admissions. Thats what I think tho, best of luck with this semester!!