how to get rid of back fat?

im F20, 5’4 and around 130lbs. i have a pretty slim shape overall due to the fact that im korean. i really want a slim toned back as i put for the inspo pictures towards the end, i did recently start weight lifting again to get back in shape but i feel like my back never gets slimmed or toned down as much as i want, is it a lack or cardio or something in my nutrition? i do cardio to slim my upper body but then i feel like my lower body loses gain as well so im not sure what to do. maybe i can slim up my whole body through cardio and target specific areas with the weight lifting for the growth? but thats my main goal in my fitness journey is to have a overall toned body with big glutes/big thighs (as most woman do), to a slimmer upper body. please give me suggestions, tips or advice!!