The easiest way to get a wallet is by going to Blockchain and creating an account there. To actually get some BTC in your wallet is by buying it on external websites or by going to faucets.
For me blockchain.info is the most easiest and user friendly bitcoin wallet of all. I don't know, I'm just comfortable in using it and it is very easy to use.
But of course, there are also other bitcoin wallets that has different qualities.