You can buy Bitcoin from several places. https://localbitcoins.com/ is a good start. First you need an account there. When you have bought some BTC you can transfer them from your wallet at Localbitcoins to an account at the exchange Poloniex, where you can buy Maidsafecoin for you BTC. Then you can transfer these Maidsafecoins to another wallet, for example a paperwallet. To be able to transfer the Maidsafecoins from the wallet at a later date, you also need to have a small amount of BTC in the wallet to be able to pay for the transaction cost. You can have both Bitcoin and Maidsafecoin stored in the same wallet address.
Here is a tutorial: