I think it will be difficult for you to convert your bitcoin to fiat money. If you can find someone who would buy your bitcoin and send you fiat money as payment, then you can do so. However, if you will only sell small amounts, it would be difficult for you to sell it because some people buy big amount of bitcoin.
Once you complete a sale, you'll receive the money into your Cash Balance and be able to either withdraw into your bank account, PayPal account or Bitcoin wallet.