Trade your LTC to BTC or ETH then you can buy alts to trade.We cant teach you here how to use bittrex to trade in,you should opt to watch videos on youtube.
I watched 10 videos on youtube, not one explained the inter trading altcoins within Bittrex. They all talk about how to deposit on Bittrex from coinbase but nothing about trading on Bittrex interchangeably. Nothing on Bittrex website that talks about this as well. Frustrating man.