Pray to her or meditate on her, and she may come to you. But don't rush into this, because gods or goddesses aren't always what their first impressions appeal them as. Don't set up an altar until you know she's chosen you.
For now, I recommend drawing her pictures. Honor her by beautifying them. Make a pretty dress on her (they usually respect their fashion, not ours) and give her a majestic pose. Don't write her name on it, because if she feels it doesn't represent her well, well, her name is already on it and this mortal had officially decreed me this selfish woman holding a torch below me, but it should be above me, etc.
What happened to me, with Athena, was, I found a rock that had a spear on it. I saved it, but thought nothing of it. My dad came home from work and said that the craze at his workplace was spear-fishing, and he said I absolutely had to go with him. I rolled my eyes at this. Then, finally, on the way back from the trip, we stopped at a gas station. I waited out in the car, and took out that lovely stone I found in my backyard woods. I started feeling it, and I got a cut. I held it up to the light, and wow! It was actually broken and it's missing a part. My neighbor found me holding it outside, as I was lookin for another piece, and he told me or was his statue from his collection of Gaming Replicas, thinking it was Azura from the Elder Scrolls. I told him it was pretty, so he told me about it busting, him thinking about recoloring the statue to make it look more like Azura, but instead gave it to me, and sculpted a statue of her in a skirt himself. I loved it, and kept it. I had it for 8 years.
It may seem coincidental at first...but it could grow stronger. Try to make a bond between Hecate and You, and eventually she may come close to you, and reveal herself.
I have abandoned my Athena faith (as horrible as that sounds, after the trouble it went for me to manifest a pantheon of her), and began an Isis faith because of a simple interest calling me. I was looking at Egyptian robes, and found an Egyptian cat with an Ankh on it. I searched it up, and similar searches were of "Isis". I knew who she was. But as I read about her, I felt a beautiful, motherly figure of her come over me, and took my interest. I got an immediate vision or inspiration of what she actually looks like! Sure enough, I searched images of her, and she looked exactly what the vision revealed. I don't know if it was her appearing in the vision, or it was my own ability presenting.