Ok... the adult hippie style is called bohemian... google bohemian chic, bohemian style, bohemian apparel... think Mary-kate & Ashley, Kate Hudson, Nicole Richie. With that said... I would look into forever21 which is very affordable, old navy even target... if you want to look older or professional while still being hippie you can get away with accesorizing, like wavy loose hair, a hair band, hoop earrings, bangles, long necklaces, hobo bags (hopefully not all at the same time 
) and keep your outfit a bit more standard...like flats (ballet flats are comfy and stylish!), dark denim jeans in bootcut or slighty flared (best fits for most people) a solid color fitted shirt or t-shirt and a jacket/sweater. The key is a neutral canvas that you can layer with great accessories. Now about makeup... I agree with highlighting the eyes...brown pencil eyeliner is the best (not too harsh not too soft, and matches all skin/eye colors) and MAC makes one that I love called teddy...dont forget mascara, concealer (if you have under eye circles) and foundation... I recommend without even seeing you to check out a mineral powder one (Bare Escentuals maybe?) just coz it's easy to apply and it feels natural on the skin (like you are not wearing any 
) and a light colored gloss/lipstick... Once you feel comfortable with wearing some makeup, you can start experimenting with eye shadows and all the other wonderful products out there Good luck!
P.S. If you like natural products like I do (for my home, skin, hair, etc) you will LOVE Bare escentuals, you can find them in Nordstroms, sephora, ulta, and their website...
) and keep your outfit a bit more standard...like flats (ballet flats are comfy and stylish!), dark denim jeans in bootcut or slighty flared (best fits for most people) a solid color fitted shirt or t-shirt and a jacket/sweater. The key is a neutral canvas that you can layer with great accessories. Now about makeup... I agree with highlighting the eyes...brown pencil eyeliner is the best (not too harsh not too soft, and matches all skin/eye colors) and MAC makes one that I love called teddy...dont forget mascara, concealer (if you have under eye circles) and foundation... I recommend without even seeing you to check out a mineral powder one (Bare Escentuals maybe?) just coz it's easy to apply and it feels natural on the skin (like you are not wearing any ) and a light colored gloss/lipstick... Once you feel comfortable with wearing some makeup, you can start experimenting with eye shadows and all the other wonderful products out there Good luck!P.S. If you like natural products like I do (for my home, skin, hair, etc) you will LOVE Bare escentuals, you can find them in Nordstroms, sephora, ulta, and their website...