Well I've just had a Google image search of AJ in the tourist and it doesn't really look like real clothing to me (not a criticism of your tastes). I'm just left wondering what you're attracted to in them, it's quite dramatic, yet very fitted with feminine tailoring and very high heels, has a bit of fluid movement, etc. I suspect that's all amplified on film (hence the costume feel to it). Rather than the practicalities of the items and how they'd look transplanted on you, can you try to distill some sort of essence that speaks to you? It's quite lady like to my eyes which is a style of dress that I do associate with dressing for politeness' sake, ie. others.
Style often gets pigeonholed into this 'good taste' notion of 'flattering', working with your body shape instead of against, quality fabrics, 'your' colours, etc. But those are just arbitrary fundamentals of dressing that you can choose to adhere to or not, and, yes, it is probably worth taking note of and there's endless information of it out there, just don't become a slave to it. Style is the essence of you that you imbue in it and what you wish to share of yourself to the outside world, in a subtle but legible language for anyone willing to take the time. You need some understanding of that and be prepared to share that with the world which is why personal style comes with a certain amount of vulnerability.
So without getting to deep, as you're clearly in the midst of figuring a lot of things out in therapy, but it's a question of who are you. The usual way is to look at others, celebrities, or clothes themselves and that can be helpful but it's probably just worth an exercise to set up two Pinterest boards. One full of random crap, anything but fashion, but that somehow touch you and draw your eye. Just keep adding and then do a good cull, only the best things get to stay.
Use the other board for more traditional fashion/clothing related references, doesn't matter if it would look good on you or not just include anything you're drawn to. Again, add, add, add and then ruthlessly subtract.
Then cross reference the two boards (maybe merge some of it into a third board) and try to look for overlaps. Is it softness you seek from undulating hills that echo in fuzzy mohair, or a very bright or very muted colour palette that goes from surreal landscapes to dresses, stern structure in modernist architecture and stiff starched pleats, a secret love of patterns in fabric and wild flower meadows, etc.
This won't tell you who you are but it will help narrow down your aesthetic preferences and that goes a long way to informing your style, baby steps and all that. Combine that with the fundamentals of dressing that work for you and you'll have some handlebars to go with. And don't worry, you're going to mess up sometimes but better to look a tit every now and then than to always be boring and appropriate.