I got an A at GCSE French, then a B at AS and dropped it but it was amazing!! I had to let it go because I did much better in my other subjects so it made sense but it was far from easy. Also had a lot of native speakers in my class and most were fluent which I saw as a bit of a cop out for an A level but hey, each to their own. Grammar was a bitch, but you get used to it, its just very repetitive and way harder than GCSE, hardest AS by farrrrrrrrr, but also most rewarding and enjoyable so go for it!!