So many questions

Should i continue taking Art as an extra subject?
What if i spend too much time on it and neglect my other subjects?
What if i end up wasting all my effort when my results come out and i dont get any higher than a B3
What if i gave up halfway?

Then should i drop to combine bio/chem?
I'm like 80% wanna drop to combine already but i'm scared later it'll affect my chances into getting into the JC i want
And even if i get into that JC i want, what if i can't cope with the pure science i've to take (wait, is it even compulsory to take science in JC if you don't wanna go towards the science courses?)

OMG, so many questions. ANYONE WHO CAN HELP ME EVEN 1% PLEASE GIMME SOME ADVICE OR SMTH LIDDAT AND WRITE IT ON MY TAG BOARD OR TEXT ME TY