Since you’ve never taken chemistry, take Chem 100.
Chem 101 is like AP chem and AP chem usually assumes some basic understanding of chemistry. In addition chemistry for stem majors trends to be a weed out course, one you dont want to get into without a background in the subject.
In high school, students would take honors chem them ap chem. The equivalent at your college would be chem 100 then 101, and if you were to major in STEM, 102.