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Yeah if I remember right on blocktrades you write @(name) (so I would write @psychoserenity) and then how much BTC you want to send (receive as Steem) and that's it.

Downside: right now it says BTC fees are like $15, for some reason. Probably because of the high congestion - it wasn't there a few weeks ago

And then from there yeah just go into steemit and power up