Radar doesn't have a built-in wallet. That means instead of depositing tokens into our app, you will need to use a Web3 enabled wallet or browser.
First you will have to install it.
You can find a link to the extension on the MetaMask website https://metamask.io/ or through GitHub https://github.com/MetaMask/metamask-extension/releases.
When you first open the extension you will be prompted to create a vault. Follow the instructions and make sure to copy your seed phrase and keep it somewhere safe.
Here's a handy video to get you going:
You can also use a wallet created through My Ether Wallet in MetaMask. My Ether Wallet put together a great tutorial on how to do this here.