H2 chem is very tough for a hybrid combi student, as phy + chem
/ bio + chem all at H2 levels are synergistic. Also H2 chem is much
tougher than pure chem at O levels and combined science students
actually learn quite simplified science. You will struggle a lot
esp. for being a hybrid combi students in JC even if you get A1 in
combined science.
So, I advise you not to take H2 chem as it is not easy to score
even for pure chem O levels students.
So, how about taking H1 Math, Geog, History and Economics? You
will have a lot of reading, memory work, essays and applications of
humanities subjects. The H2 subjects will be a little
synergistic.
Or if you would really like H2 chem, you may appeal for hybrid
subject combination at maybe SRJC. But I advise against it as
combined science is not a good gauge of how you will perform in H2
chem.
The arts stream in JCs offer fewer open doors to local unis.
I am a science tutor, but I am just hopefully being more
objective.
All the best!!