Yes that is correct. I think the nicehash software actually uses Claymore and EWBF miners to mine in the background.

The nicehash service is essentially a place you can sell your hashrate and other people can rent it to mine for themselves.

You run the software and then you will have to benchmark your hardware which will score your hashrates for each algo.

Then using the scores the nicehash miner will automatically switch between coins as to what is most profitable.

You will then be paid in BTC directly without the hassle of selling the coins that you mine.

It a simple way to get you started right away, expose you different algos and you can get insight into your hardware.

Remember nicehash generally is not as profitable using a pool to mine the coins for yourself.

blockchain.info wallet is actually fairly secure and you will need an address for the nicehash miner.

Enjoy!