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no, no buy them at bittrex or the internal market! You need BTC to do that! Go in your Wallet, where it says steem , click on the right to open the submenu and click on buy, you will get redirected to blocktrades an exchanger where you can transfer some Bitcoins to get Steem. If you have more question, just ask :)

I have no bitcoin and don't even know how or where to buy them.

ok, so open yourself an account at uphold.com ( thank me later for it ) this is a gaetway between the FIAT world ( dollar euro yen etc. ) and Crypto, once you are verified you can add your bankaccount and transfer some money to it. Once your U$ arrived you can change it easy to Bitcoin or Ethereum for example. Once you got the Bitcoins send them over to an Exchanger and buy Steem :) I sounds complicated on the begining, but it is not :)

Instead of bank account can I use my PayPal?

You need to buy BTC first as I know. But you can buy BTC with paypal.

So far you are the only one that has been willing to help me understand and I really appreciate it, thank you.

no problem