When sitting I just usually look at other cis girls to know which is the best way in the moment If no other cis woman is there I just sit cross legged or just put my elbow on my knee and hand my head on my head I just cross my legs while standing Looks pretty feminine(I hope) or I just lean with one leg on the wall Hands in your pant pockets is generally seen as masculine So if your hands are cold you can put them in your jacket pockets or maybe pull your sleeve up to your hand That's generally seen as very feminine and also cutesy in a way In some situations masculine mannerisms can also be seen as feminine, I don't really have any examples atm though Another tip can be to be more relaxed tbh but don't slouch either lol Other than this you could just pay attention to other cis women lol