If you’re a sophomore, look into a Rotary year in France, or YFU, for a gap year between junior and senior year in HS ornpoet graduation. You’d need to learn French first to the highest level you can (Middlebury’s intensive summer program is the best but selective and deadlines may be near if not passed; Concordia Language villages are a fun introduction over the summer; there’s the Summer Intensive Language program at Penn State if you’re 15-16+, don’t know the living situation).
However if you can reach level 3-4+ (AP best) France offers something of interest to you: a choice of specialties in Terminale (12th) where in addition to basic classes you’d be able to take 6 hours/week of “spécialité LCA Latin”(grammar, literature, civilization/art,+ comparative literature) + 6 hours of another spécialité (including a choice from philosophy, History& geopolitics, sociology &economics, calc, Physics… sometimes Spanish Literature & culture or art history…) + 3 hours of ancient Greek. So, you’d learn French from being immersed in it AND continue with Latin (and might take up Greek).
The suggestion of studying in Quebec is another good one - Mc Gill, Concordia, Bishop’s are the English speaking universities there. You also have universities that teach in French, plus French speaking programs such as Moncton’s.
@DadTwoGirls : yes it’s not necessary to have taken an AP Foreign Language class to take the exam, but one must have taken some Language classes (either 4-5 years in HS or 3-4semesters in college through dual enrollment) to have a shot.