Hey kaylagirl0806!
Hows it going with the new wardrobe. Such really good suggestions here, yes Vans, spiffing idea as well! Young fashion can be very adaptable and androgynous, too.
As for jeans, skinnies are a great start, especially when they seem to make your ankles seem smaller (they seem to make mine look smaller). Flared jeans are also now associated with a feminine silhouette (despite their unisex appeal in decades past). High-waisted jeans made for females are also good, as they are a specific shape and tend to pull in the waist a little, whilst appearing to reduce the height of the chest at the same time.
Fabrics! Very important. Some fabrics are exclusive to one gender. Shiny fabrics almost are the preserve of women, as are nylon and man-made fibres in bright colours. I have some women's trouser suits which are juuuuuuust about passable as a male wardrobe, unless you look closely. The fabric tends to shimmer slightly, its much softer and clings to the skin a little when there is movement, (which feels absolutely gorgeous!), so very different to male fabrics which do not have that sensual appeal, as men are not meant to have such appreciation for such tactile experiences (I don't believe men do not have such appreciations, despite the fact that women's skin can be more sensitive). There's a definite difference with the colour and texture of male and female jeans as well. Female jeans (at least with young fashions) tend to be softer to the touch, and with a more delicate or bolder colour, whilst men's jeans tend to be more workmanlike, generally and with a subtly different colour variation.
It can take a while to build an androgynous wardrobe that can both allow you to "pass" as male, whilst still allowing you to feel feminine. I've just about gotten there :p After much experimentation at cheap trendy shops like the UK's Primark. I now have a wardrobe that's got clothes that are passably male but with overtly female flourishes. Its a VERY fine balance and I can see people look me up and down, see the feminine elements and raise their eyebrows, but then see the fact I'm not wearing - for instance - an an obvious blouse, heels, or a skirt. So the result is that they just view me as eccentric :p And don't question the gender.
Feel free to message me if you like. I'm not an expert and I happily make fails (all part of the experimentation), but I worked at a department store and dressed the male and female mannequins so that really helped me to design a feminine yet masculine wardrobe.