Have you ever bought any cryptocurrency before or are you new to the sector as a whole? If you're a veteran, you can find it on the Bittrex or Poloniex exchanges or I believe you can buy it directly from here with Bitcoin. If you're fresh to the scene and have no idea what those two things I just mentioned are, the answer is a bit more complicated as you'll have to get your hands on Bitcoin or another cryptocurrency prior to buying Steemit...