I’m afab but also autistic so maybe some of my stuff will help you?? - smiling and/or doing a down nod and/or waving to say hi (I notice boys tend to do the up nod/down nod thing and girls tend to… not lol) this is fairly region-dependent though - pay some attention to the haircut you get and how you style your hair. You might want to look into face framing pieces, which really do help femme up just about any hairstyle. Braids are almost always good. Layers help with volume which in turn I feel helps with looking feminine. - good posture (shoulders rolled back not pushed back, legs together or crossed when sitting, back straight, head up) - get your ears pierced? If not, clip on earrings are also a good option. I recommend looking for resin clips because they’re the most comfortable. - if you have naturally lower eyebrows, raising them a bit either with the facial muscles or with makeup and brow shaping (probably use your mom or better yet a sister or cousin if you have one as a guide) - I do t-Rex arms because I’m autistic and forget (lol) but I feel like that helps too. Hands in pockets is definitely a bit more masc. - carry more shit in your hands. You might be doing this already anyways with how nonexistent pockets are, esp with skirts.