To buy EOS on BitShares, you buy OPEN.EOS. There are plenty of posts and videos on the web about how to use BitShares and the OpenLedger gateway.

Here are some of my posts;

• My Altcoin Investments: A Steemit Story
• Playing in the Margins: bitUSD and BitShares on Open Ledger
• Reading the BitShares Whitepaper
• Questions from a BitShares Newbie
• A Simple Example of Shorting the U.S. Dollar With BitShares
• 9 Day bitUSD Loan Result: 19,821 BitShares and 199 ZAPPL for Free
• Are you Shorting Fiat Currency yet?
• I Got Margin Called on HERO Today. Things Don't Always Go Up.
• Do Cryptocurrency Speculators Fear Utility?