Many thanks Jake! To be honest I'm not sure about Paypal.

I find the best way to go to coinbase.com and buy Bitcoin with USD or EUR. Then send it to an exchange (I recommend Bittrex.com) , there you can easily exchange your BTC (Bitcoin) to STEEM with a 0.25% fee.

From Bittrex you can send your STEEMs to your Wallet here on Steemit website (click on your profile on the top and click on Wallet -> click on Permissions -> Copy the MEMO, this is the string of numbers you will paste in Bittrex as your "SEND TO" address.