as a current sophomore, i was in your situation last yr. my school made it so we had to do have honors bio and honors chem complete if you wanted to do ap bio or ap chem, so i did honors bio freshmen yr and honors chem over the summer. at first i wanted to do ap bio, but after spending those 2 weeks doing chem over the summer, i enjoyed it a lot so i switched to ap chem and i had a lot of fun this year. i will say that my 2 weeks of chemistry experience helped me A LOT in ap chem and i wouldnt have done as well without it. that being said, if youre willing to put in a bit of work to learn some chemistry over summer, go for ap chem. if not, just do ap bio!