Definitely start growing your hair out. Lots of males have hair of all lengths. I've worn long hair most of my adult life, though much of that time I wasn't presenting as necissarily feminine. Once the top is to your chin or so you can get a blunt cut which is very versatile for gender crossing. You can ponytail when looking more masculine and wear it loose and curled when feminine.
Get some hair ornaments like headbands and barrettes. These can be worn on hair of any length and look very feminine. I'm not so big on scarves on the head as they always suggest a cancer patient of someone with hair loss. Scarves look great on the neck, though.
Start wearing earrings if you don't already. Get pierced if you can, but you can find lots of inexpensive clip rings online if you want. It's amazing how feminizing a nice pair of earrings can be. Learn to do makeup well. A simple short hairstyle can look very feminine if the person has good makeup. Don't get the whole works and try to learn it all at once, though. Take one thing at a time like mascara or lipstick+liner and play with it until you've mastered it. Going low key is always best when learning, though.
