Hey. Install Waves App into your Google Chrome browser, then create a new account. See user's manual - http://coremedia.info/WavesWallet-HowDoesThisWork.pdf

Copy your wave address and save it on the page of your ICO account. Confirm it via your email (you will receive email notification).

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Or just sign up on the Bittrex exchange. Use your Waves address from exchange - https://bittrex.com

And see this notes - https://blog.wavesplatform.com/instructions-for-deposting-waves-to-bittrex-12aecb22ab61#.jzp5jsahk