3 months enough time to train ??

hey everyone! ive been dragged into doing hyrox with a friend and have just realised ive really only got 3 months to train. right now i can only run 2km straight without stopping and i currently go a gym 4x a week that consists of crossfit/metcon style workouts. ive also started doing one or two sessions at f45 which is supposedly hyrox focused. is 3 months enough time because i feel like its not