U can use http://openledger.io ! it has almost every coin poloniex has and its decetralized and so its available in every country period!
u can use it to buy nd sell bitcoin or ethereum or bitsars or many other altcoins for steem or SBD

also yes blocktrades.us lets u convrt the ethereum to steem

also u can use my new website http://www.localaltcoins.co pwered by steemit and post a trade asking f someone will trade you steem or steempower directly for ethereum! it is a cool method i made to help stemit users trade with each other!

DONT worry u got this!

once u do a few things on steemiit u will not forget! its easy and u will be able to help others soon!