Keeping in mind that I'm AMAB and trying to be subtle about things...
Most of my clothes are from the men's aisle, with a few exceptions. Clothes are just cloth and don't have a gender, sure... but social constructs aside, clothes are often designed either to fit curves, or a more "square" broad shouldered body. I've found in the past that a lot of women's shirts don't flatter me, and especially don't fit well in the arms.
I've always had a tendency to buy somewhat oversized button-up shirts. I'm fat, and a 3XL shirt is typically just an M shirt scaled up everywhere... so to be comfortably loose at the belly it's going to be looser everywhere else. As it turned out, I kind of liked that, and wear my shirts untucked.
My more recent insight was that this is absolutely great for layering over a t-shirt or tank top. Leave the shirt unbuttoned, and it's nice and flowy. Button it halfway, and it's a little less casual and makes a deep V that's not bare skin, which is a great place to have a necklace. Either way it's another color accent, though black can work well here too. (So far my favorite combos have been purple over black, a sort of mulberry over dark green, or a black and white floral print over a bright yellow.)
I can strongly recommend the Tencel modal muscle shirts from Tomboyx; for me the fit is great and the fabric feels amazing. (The regular tank is scooped quite low in the neck and I feel like I'll have to shave my chest to make it work.)
This isn't an exclusively feminine style by any means, but layering does seem to come into play in a lot of women's styles. And with fun colors/patterns (I avoid more masc stuff like plaid or checks) it can read as fairly androgynous.
And of course, there's also cardigans and such. Hoodies I think are very unisex in that they don't say anything about gender one way or another, although maybe longer lengths and other colors might. The one cardigan I tried so far is ankle length and a bit odd, so I want to try something more mid-thigh and preferably with buttons. That'll be for the next round of shopping.
I've temporarily banished the blue jeans and Crocs-On-The-Clock that I had been wearing exclusively. I've been wearing black jeans, and black or brown chinos so far. Again I think some more color here might read as more androgynous, and I love purple so I might go that route. Back in high school I used to have some batik print pants, and I might go back to that for a more boho look. I have some Thai harem pants that are ridiculously comfortable, as well as linen beach pants, but this being winter I haven't worn those outdoors. I also got some leggings which I need to figure out -- I feel quite good about the shape of my legs but absolutely not the overhanging belly, so some kind of high-waisted compression underwear might be in store.
For shoes I went big on Chuck Taylor All Stars. Two pairs of hi-tops, one in classic black and white and one that's black/purple with yellow trim (3/4 of a nonbinary pride flag). These were recommended in more than one guide for trans and nonbinary folks, because they are truly unisex, come in a wide size range but can also be kind of cute and sassy. I also took a risk on Chuck 70 De Luxe Leather & Buckle, which are pure rock and roll -- technically unisex but also described as "biker babe", they have lugged soles and big chunky heels and I love them more than I expected to. Not office wear but I'll certainly wear them going to restaurants and stuff. And to round things out, I got some Thursday Harness boots in black suede -- sort of dressy cowboy style but they have what seems like androygnous flair too, not too much for the office as long as the pants are right.
What else... my spouse convinced me to try no-pierce earrings as an experiment and I actually like them, so I'll be trying more and maybe getting pierced. The ones I started with are 6mm, a ring of black crystals with a clear one in the center that catches the light. I think they work well with my glasses, face, the driver caps that I like, etc.
I like making beaded necklaces and have been looking at other pendants and such. I'm trying to figure out rings; I feel like those can help a lot, but more thin and delicate ones just make my hands look more big and crude, while too chunky of a ring kind of annoys me. Bracelets I'm not sure of yet.
I haven't done much with makeup and probably never will. Subtle mascara can be nice, but I have a thing about stuff in or near my eyes, so forget about using a curler, or eyeliner.
